The boat is now leaning at a 30 degree angle.

这条船现在正以30度角倾斜着。

《柯林斯英汉双解大词典》

Elbows should be at a 90-degree Angle. Again, a keyboard tray can work wonders here.

肘部应保持90度的角度，同样的，一个键盘托盘可能会非常有用。

youdao

Drop your arms and shake them out. Then re-position them at a 90-degree Angle.

放低你的双臂，并用力摆动双臂，然后令你的双臂成90度角。

youdao

May hurt a little bit, but try as much as possible to create a 90 degree angle.

可能有点痛，尽可能形成一个直角。

哈佛公开课 - 幸福课课程节选

Now take these two fingers-- the middle finger and the thumb-- and as much as possible, from that 90 degree angle, create a circle.

再让这两个手指-,中指和姆指-,尽可能保持直角时围成一个圆圈。

哈佛公开课 - 幸福课课程节选

So-- if you don't feel comfortable doing it, don't do it-- what I'd like to do now is as following: Take your thumb and your middle finger and create as much as possible a 90 degree angle.

感觉不舒服的，就不要做，希望按下面的指示做：,让你的姆指和中指,尽可能形成一个直角。

哈佛公开课 - 幸福课课程节选

These opposing attempts to go at a 45-degree angle counterbalance into a 90-degree movement.

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The machines can also tilt so that they lie at a nearly face-up 80-degree angle.

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Instead, place your notes on one side of the lectern at a 90 degree angle.

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