It would have been better to have thinned the trees over several winters rather than all at one time.
当初要是分几个冬天来疏剪树木，会比一次性疏剪要更好些。
At one time, Henry needed a grammar book for his study.
曾经有一段时间，亨利需要一本语法书来学习。
At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made.
曾经有人认为，这些基质颗粒可能是原始的星云尘埃，即形成陨石球粒及其内含物的物质。
He was at once furious and slightly pleased, if a person could be both at one time.
他既生气又有点高兴，如果一个人能同时拥有这两种情绪的话。
The fact that lake levels in the semiarid southwestern United States appear to have been higher during the last ice age than they are now was at one time attributed to increased precipitation.
美国西南部半干旱地区的湖泊水位在上一个冰河时代似乎比现在更高，这一事实曾一度归因于降水增加。
At one time, soap-making was not safe.
曾经有一段时间，制造肥皂并不安全。
At one time, ecologists believed that species diversity made ecosystems stable.
生态学家曾一度认为，物种多样性使生态系统变得稳定。
This helps remove the unnecessary fear of having to do a large project all at one time.
这有助于消除对一次性完成大型项目的不必要的恐惧。
The parents were asked to interact with their children as they normally would, and about half of children in the study played with puzzles at one time.
研究人员要求这些父母像往常一样与孩子互动，同时研究中大约有一半的孩子曾玩过猜谜游戏。
It includes four steps: seeing a word, getting back its meaning from your memory, connecting it to other words in the same sentence, and then moving on to the next word. This process uses many parts of the brain at one time.
它包括四个步骤：看到一个单词，回忆这个词的意思，将它与句子中其他单词联系起来，再看下一个单词。这个过程同时调动了大脑的很多部分进行工作。
One of the greatest mistakes people make in setting goals is trying to work on too many things at one time.
人们在设定目标的时候，犯的最大的一个错误就是企图在同一时间内做过多的事情。
If there are blocked tests, you can select several CTCs simultaneously and mark them all as blocked at one time.
如果存在闭塞的测试，那么您就能够同时选择若干个CTC并且将它们一同标注为闭塞的。
Typically you create a session, perform several configuration changes, then save all the changes made during the session at one time.
通常，您会先创建一个会话，对配置做几处更改，然后一次保存会话过程中所做的全部更改。
My brother at one time would spend days at his piano engrossed in the creation of new tunes.
我的兄弟有一段时间会在钢琴边一坐就是好几天，完全沉浸在谱写新曲中。
This is useful when editing and visualizing the structure of the information all at one time.
当您在编辑并同时查看信息的结构时，这一点就十分有用了。
They may not remember that at one time their infrastructure was new and replaced some other set of tools.
他们可能没有记住，他们的基础结构曾经也是新的，并且取代了其它一些工具。
Everyone at one time or another has constructed one of the most tried and true home science experiments: The Volcano.
每个人或多或少的有过筑造出一个被尝试最多也是最名副其实的家庭科学实验，这就是：火山。
The funny thing about many cliches, however, is that at one time they reflected accurate and original thinking.
尽管如此，有趣的是，在某一段时间这些陈词滥调曾反映了精确和新颖的思想。
Realize that very few people, if any, with a long list of bad habits can change that entire list at one time.
要知道，那些有着长长的坏习惯列表的人中，即使有的话也是极少数能一次改掉所有。
At one time I was an extreme optimist, but Life has battered me down enough times to temper this optimism down a bit.
我曾经是一个极端的乐观主义者，但是生命给了我足够的打击，使这种乐观情绪下降了些许。
What's interesting with this model is that multiple readers are permitted access to the data at one time, but only one writer.
这个模型有趣的地方在于允许多个线程同时访问相同数据，但同一时刻只允许一个线程写入数据。
Sometimes clans based on water rather than blood harbor several such personages at one time.
从前一度有一些家族基于养育而非血缘收养几个这样的人物。
At one time most women made their own clothes, buying the cloth in small stores.
曾经有段时间，大部分女人都在小店里买布料自己做衣服。
Any stress or sudden change in her life at one time would send Saks into a tailspin psychologically.
她生活中的任何压力和突变过去会将它送入心理上的混乱。
But Zhang Kai, a lawyer who at one time represented the family of Chen Xiaofeng, called the verdict flawed.
但是曾一度代表陈晓凤家庭一方的律师张凯表示，审判存在问题。
It was at one time white faces, not white bags: white faces.
原来曾用过“白色的面孔“,不是“白色袋子
It was at one time white faces, not white bags: white faces.
原来曾用过“白色的面孔“,不是“白色袋子
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