为什么“磨刀不误砍柴工”?
答:磨刀是为了在压力大小一定时,减小受力面积来增大压强,容易砍柴.
卖片花
把下列句子译成英语。
1.迟早他们会灭绝的.
they will extinct.
2.我们政府正在努力拯救熊猫.
Our government is to save pandas.
3.老虎、鲸、海龟是一些濒临灭绝的动物.
Tigers,whales,and turtles are some animals .
4.帮助动物还有很长的路要走.
It's a long way the animals.
5.自然保护区是动物的家.
are the animals'houses.
6.在野外是很少见到这些动物的.
It's difficult to see these animals .
7.这些动物无处可居.
These animals have .
8.他们将没有足够可吃的食物.
They won't have .
9.我们必须阻止人们杀害动物.
We need to people killing animals.
10.现在人们已经开始制定计划来保护动物了.
Now people have to protectanimals.