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1·The prisoner was keeping back vital information.

该囚犯有重要消息不肯吐露。

2·Lie on right side, keeping back straight and neck supported with right hand as shown.

右侧卧，保持背部伸直，右手像图示一样支撑颈部。

3·However, it has some disadvantages keeping back its application, such as low quantum efficiency, low reaction rate.

就目前而言，量子效率低、反应速度慢等缺点制约了光催化氧化的应用。

4·Keeping your muscles strong and in tone helps you to avoid back problems.

保持强壮有力的肌肉有助于防范背疾。《柯林斯英汉双解大词典》

5·I'm sure she's keeping something back from us.

我肯定她有什么事瞒着我们。《牛津词典》

6·Standing with feet shoulder-width apart and cradle baby with both arms. Keeping a straight back and repeat deep knee bends.

双脚分开与肩同宽，双臂抱着婴儿。保持背部挺直，重复深膝弯曲。

7·One school that keeps records of false claims says that the practice dates back at least to the turn of the century—that's when they began keeping records, anyhow.

一所保存虚假声明记录的学校说，这种做法至少可以追溯到世纪之交——不管怎么说，那是他们开始保存记录的时候。

8·These roller bags that make it easier to lug your junk around airports are in keeping with etymology stretching back more than 600 years.

这些滚轮包可以让你更方便地在机场拖着你的杂物，它的词源可以追溯到600多年前。

9·Tot squats (hamstrings) : Standing with feet shoulder-width apart cradle baby with both arms. Keeping a straight back repeat deep knee bends.

幼儿蹲坐(腿腱)：两手放在婴儿车上，然后双脚与肩同宽，保持背部挺立，然后重复弯曲膝盖。

10·Keeping the argument separate from the relationship status is key to getting things back on track.

让争吵与爱情关系相分离的状态是使一切回到正轨的关键。