Of or relating to a celestial body, especially an asteroid, that is in one of the Lagrangian points of a two-body system.

特洛伊银河体系：为双体系统中拉格朗日点上一个天体的，尤指小行星，或与之相关的。

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The video concludes 'even though you don't break down the rubber polymers, your body has no problem moving that lump of gum through your digestive system and out the other end within a day or two.

视频最后总结说，“尽管橡胶聚合物没能被分解，但你的身体也完全可以把这一团口香糖清除出消化系统，‘这头进那头出’，只要一两天时间。”

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Practice a mild forward bend or two in order to lengthen your back body and quiet your nervous system.

练习一至两个柔和的前屈，来拉长身体的后侧，并且让神经系统安静下来。

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However, closer examination revealed differences between men and women in two key components of the immune system - T-cells, which protect the body from infection, and B-cells, which secrete antibodies.

BBC: Biological clue to why women live longer than men

Beta blockers work by reducing activity in the sympathetic nervous system, which is one of the two major branches of the body's stress (or fight-and-flight) system.

CNN: Have you heard of a heart drug that also helps PTSD?

The Met's founders wanted to create a democratic body that was "in tune with the people" and so deliberately avoided the two-tier system of recruitment that existed in the army.

BBC: What do bobbies learn on the beat?