They do chores at home and hopefully manage to find some time to study before it gets dark.
他们在家做家务，希望能在天黑前找到时间学习。
Before it gets dark, I'll come back.
天黑以前我会回来。
We must get off before it gets dark.
我们必须趁天黑前离开。
I'll water the flowers before it gets dark.
我要趁着天还没黑把花浇好水。
I want to cover 100 miles before it gets dark.
在天黑之前我想行程100英里。
I want to cover 100 miles before it gets dark.
在天黑之前我想走完一百英里。
He shall water all the flowers before it gets dark.
他必须在天暗之前给所有的花浇水。
I want to see the last one fall before it gets dark.
我希望在天黑之前看到最后的藤叶飘下来。
I want to see the last one fall before it gets dark.
我要在天黑前看到最后一片叶子掉落。
We have to get to the foot of the mountain before it gets dark.
我们必须在天黑前下到山脚下。
There's a reasonable prospect of reaching the trapped child before it gets dark.
在天黑前找到那个被困的孩子应该是可能的。
But you have to work out carefully how much time you have and go back home before it gets dark.
但是你不得不小心的去计算过了多久，因为必须在天黑之前回家。
At the end of everyday, you have to put the saddle on the horse and go out and round up the cows before it gets dark.
每天傍晚时分，你还得给马配上马鞍，在天黑之前骑马出去把所有的奶牛赶回来。
In the United states, during the summer, some areas use Daylight Savings Time. In these states, people set their clocks forward one hour so that they can enjoy a longer evening before it gets dark.
在美国，夏季一些地方用夏令时，在这些州，人们把时间向前调1个小时，这样他们可以在天黑之前享受更长的黄昏。
Or we could compare it with the sun. When clouds obscure the light from coming to the earth, it gets dark; but the sun is still as bright as before.
或者我们可以用太阳来比喻：当乌云遮住了太阳，阳光照不到地球，天色就会变暗，但是，这时太阳还是像以前一样明亮。
In winter, it gets dark before five.
冬天时还没五点天就黑了。
In winter, it gets dark before five.
冬天时还没五点天就黑了。
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