In 2006, Khan made homemade videos to help his ninth-grade cousin with math.
2006年，可汗自己制作视频，来帮助他九年级的表弟学习数学。
My ninth-grade art teacher doesn't give any grade above 94% because, she says, "There's always room for improvement."
我九年级的美术老师不会给分高于94分，因为她说：“总有进步的空间。”
Consider that nearly two-thirds of students will experience the "ninth-grade shock," which refers to a dramatic drop in a student's academic performance.
考虑到近三分之二的学生都将经历“九年级冲击，即学生的学习成绩急剧下降。
One study of ninth-grade students found that 50 percent of friendships among ninth graders changed from one month to the next, signaling striking instability in friendships.
一项对九年级学生的研究发现，在九年级学生中，50%的友谊每个月都会发生变化，这表明友谊极其不稳定。
Given all that's riding on having a successful ninth-grade experience, it pays to explore what can be done to meet the academic, social and emotional challenges of the transition to high school.
考虑到这一切皆依赖于成功的九年级经历，那么探索如何在高中过渡期应对学业、社会和情感方面的挑战将是很有价值的。
Now, this ninth-grade diploma isn't going to help me much in life.
眼下，这个九年级的毕业文凭在我的生活中不会有多大帮助的。
Now, this ninth-grade diploma isn't going to help me much in life .
眼下，这个九年级的毕业文凭在我的生活中不会有多大帮助的。
In Chicago ninth-grade students were rewarded on a sliding scale for good grades in five courses, including English, maths and science.
在芝加哥，九年级学生们可以因为英语、数学和科学等五门课程的好成绩而获得阶梯式奖励。
That it might end up on the syllabus for ninth-grade English was probably close to the last thing Salinger had in mind when he wrote the book.
塞林格写书的时候万万不会想到，《麦田里的守望者》最终会收进九年级的英语课本。
In the U.S., a high school-educated worker is 1.8 times as productive, and a college graduate three times as productive, as someone with a ninth-grade education.
在美国，相对于只接受9年教育的人而言，高中学历的工人生产力是其1.8倍，大学毕业的工人则是其3倍。
During the year, I was a primary school English teaching fourth grade and fifth grade, at the same time as the school ninth-grade physical education tasks, work full and no shortage of challenges.
在这一年里，我担任小学英语四年级和五年级的教学工作，同时担任学校校九年级的体育课任务，工作充实而不乏挑战。
I wasn't looking forward to entering the ninth grade.
我并不期待进入九年级。
This dream came true for me one afternoon in the ninth grade.
九年级的一个下午，我实现了这个梦想。
To make things worse, I managed to fall right in front of four girls from the ninth grade.
更糟糕的是，我正好摔倒在四个九年级女生的面前。
More than half of students will find their academic performance declining sharply when they enter the ninth grade.
超过一半的学生会发现，当他们进入九年级之后，他们的学习成绩会一落千丈。
The consequences of doing poorly in the ninth grade can impact more than students' ability to find a good job.
在九年级表现不好影响的不仅仅是学生找到好工作的能力。
Students lose many of the friends they turned to for support when they move from the eighth to the ninth grade.
当学生们从八年级升到九年级时，他们失去了许多曾经寻求支持的朋友。
我是九年级学生。
Junior high was always a difficult time for me, and the move made my ninth grade year even harder.
对我来说，初中一直是一段艰难的日子，而那次搬家让我的九年级生活更加艰难了。
In the new global economy, students who fail to finish the ninth grade with passing grades in college preparatory coursework are very unlikely to graduate on time and go on to get jobs.
在新的全球经济中，未能完成九年级学业并通过大学预科课程的学生很难按时毕业并找到工作。
In the ninth grade, Bill went out for the race again.
九年级的时候，比尔又参加了比赛。
The summer vacation after the ninth grade is quite long, so Harry plans to go to a basketball camp.
九年级后的暑假很长，所以哈利打算参加篮球夏令营。
Then, in eighth or ninth grade, I studied astronomy, cosmology, and the origins of the universe.
后来，在八、九年级的时候，我在学习天文学，宇宙学和宇宙的起源。
In retrospect, I wouldn't change my ninth grade experience, because I learned many of life 's important lessons from my friends and the ignorance of teachers and administrators.
回首过去，我是无论如何都不想改变九年级的经历的，因为那时我从朋友以及老师和领导的偏见中学会了人生许多大道理。
Jessica and Joyce were best friends in ninth grade.
在九年级时，洁西卡和乔依丝是最好的朋友。
His old high school recently began offering Chinese classes as early as ninth grade.
他的母校最近已经开始为九年级学生开设中文课程了。
In ninth grade, your idea of a friend was the person who went to that party thrown by a senior so you wouldn't wind up being the only freshman there.
九年级时，好朋友是陪你一起参加高年级同学举办的派对让你不会因陌生人而感到紧张的人。
In ninth grade, he started hanging out with a group of film students at Louisiana State University, where his father taught education. “My idea of the world got bigger, ” he said.
在九年级，他开始和他父亲教授教育学的路易斯安娜州立大学的几个电影系学生交往，”我对世界的了解变得更广，“他说，”我对自己的期待变得更大，在那个年纪我就象海绵一样可以吸收各种东西。
In ninth grade, he started hanging out with a group of film students at Louisiana State University, where his father taught education. “My idea of the world got bigger, ” he said.
在九年级，他开始和他父亲教授教育学的路易斯安娜州立大学的几个电影系学生交往，”我对世界的了解变得更广，“他说，”我对自己的期待变得更大，在那个年纪我就象海绵一样可以吸收各种东西。
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