It depends on how full the class is and how many additional students the professor is willing to let in.
这取决于课堂有多满，以及教授愿意让多少额外的学生加入。
As a preventative measure, we are told to let in fresh air by opening the windows and not to use the air conditioners.
作为一项预防措施，我们被告知要打开窗户让新鲜空气进来，而不要使用空调。
Can you see it when I open the shutter to let in the light?
如果我打开百叶窗，让光线进来，你能看见吗？
The windows were quickly opened, to let in a little fresh air.
窗户很快打开了，好让一点新鲜空气进入。
Houses built before 1939 use about 50% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps that expand over time and let in more outside air.
1939年以前建造的房屋每平方英尺消耗的能源比2000年以后建造的房屋多50%，这主要是由于微小的裂缝随着时间的推移而扩大，更多的外部空气进入了裂缝。
The more we open, the more light we let in.
我们打开愈多，我们就让愈多的光进去。
Open a window and let in the natural light instead.
打开窗户用自然光代替。
Do you think Matt should be let in on Mystic Falls' secrets?
你认为该让Matt知道神秘瀑布镇的秘密吗？
At the Vanity Fair party, they were let in the back door.
在《名利场》杂志的聚会上，他们从后门进来。
Frequently we need to open a vent to let in a little cold air!
我们经常需要打开一个口子以放进一些冷空气！
Trim tree branches and shrubs around the lawn edge to let in more sunlight.
修剪草坪周围的树枝和灌木，确保阳光充足。
Still others complain that too many countries have been let in before they were ready.
更有甚者抱怨许多国家尚未准备便被吸纳进来。
Open a window whenever you can to let in some fresh, cleansing air. The air outside is cleaner.
尽量打开窗户让新鲜、净化的空气涌入，外面的空气更清新。
Many in Brussels think the EU let in Bulgaria and Romania, which will join in January, prematurely.
布鲁塞尔的很多人认为欧盟让保加利亚和罗马尼亚在明年一月份加入还为时过早。
To you, leaving that window open just a crack during the day is a way to let in a little fresh air.
对于你来说，在白天把窗户打开出一条缝隙是为了呼吸一点新鲜空气。
Too much and it will let in water which will make the formation of those pesky hydrates more likely.
而吸油太多，则会使底部海水渗入，从而更易生成那些烦人的水合物。
Getting out in the sunshine and breathing some fresh air can open your mind and begin to let in positive thoughts.
出去吸收一些阳光，呼吸一些新鲜空气，可以帮你打开心扉，并开始让你积极思考。
To you, leaving that window open just a crack during the day is a way to let in a little fresh air. To me, it’s an invitation.
白天你把窗户打开一点，对你来说是想让新鲜空气进来，对我来说这是发出的邀请，哈哈。
The outside of the Villa Saitan building is covered with leaf shaped holes that let in light and add character to the structure.
公寓的外墙上是一些叶子形状的孔洞，既实现了采光的需求，也为整座大楼平添独特的个性。
A commission report showed that the three countries (Britain, Ireland and Sweden) that let in workers from the east in 2004 all gained.
据一份委员会的报告显示，三个接纳东欧外来劳工的国家(英国、爱尔兰、瑞典)在2004年皆有所获利。
Or perhaps your daughter felt you might tell other people outside the immediate family whom she was not yet prepared to let in on her secret.
又或者也许你的女儿认为你会告诉其他人这件事，而她还没有做好准备让她的秘密曝光。
It could also be used to develop Windows that maximise the amount of light they let in and to create brighter LEDs and computer displays that use less energy.
该技术同时可以用在窗户上最大限度的让可见光进入，或者制造更高亮度的LEDs和电脑显示屏同时降低能耗。
These hexagonal transparent areas not only let in extra light to the Forvision's cabin but also capture the sun's energy to power the car's interior lighting and climate system.
这些六边形的透明区域并不仅仅增加了进入车体的光线，还可以吸收太阳能以维持车内照明和温控系统的正常运作。
These hexagonal transparent areas not only let in extra light to the Forvision's cabin but also capture the sun's energy to power the car's interior lighting and climate system.
这些六边形的透明区域并不仅仅增加了进入车体的光线，还可以吸收太阳能以维持车内照明和温控系统的正常运作。
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