困难的

When you are first starting, however, it is extremely difficult.

当你第一次启动，但是，它是极其困难的。

Get up steam, and you will be sure to overcome the difficulties

打起精神来，你一定会克服这些困难的。

Mathematics is hard , but if you stick it out you'll understand it .

数学是困难的，但如果你努力学习，坚持到底，自然就会了解它。

They put me in a sticky position.

他们将我置于一个困难的境地。

It's difficult to track an animal over stony ground.

要在石头路面上追踪动物是很困难的。

She told us that your father just passed away, and you became the most straitened student in our class.

她告诉我们你父亲刚去世，成了我们班里最困难的同学。

We are now in financial straits .

我们现在处于经济困难的境地。

It is going to be a long, difficult struggle.

它是一个长，困难的斗争。

I must sty something difficult.

我必须尝试困难的东西。

Pull off: to succeed in doing sth that is difficult.

成功完成某个困难的事

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。