1.stretch out v. 伸出；伸直四肢

And the Egyptians will know that I am the Lord when I stretch out my hand against Egypt and bring the Israelites out of it.
我伸手攻击埃及，将以色列人从他们中间领出来的时候，埃及人就要知道我是耶和华。

One theory suggests gliding saves energy.So researchers tested that idea using colugos—mammals from Southeast Asia that turn into giant skin sails when they stretch out their legs.
有一种理论认为滑行节省体力。因此研究人员用飞鼯猴—一种来自东南亚的哺乳动物，当它们滑行时会伸展出四肢，变成一张巨大的翼膜。

2.ought to 应该

I think I ought to cut in on what they are doing.
我认为对他们现在干的事我应当进行干预。

You ought to be ashamed of your foolish behaviour.
你应当为自己的愚蠢行为而感到羞耻。