In this paper it is discussed how the material should be reasonably selected in machine design according to its strength, stiffness and density, so that the weight of machine parts can be lighten.

叙述机械设计过程中，如何根据材料强度、刚度与密度之间的相对关系，合理选择材料，以减轻机械构件的重量。

youdao

Instead, forgiveness can be the agent that frees you to move on and lighten your energy.

相反，宽恕可以成为推动你继续前进来减轻你的能量的推动机。

youdao

If the personis just in a bad mood (maybe because of something you did, maybe not)you might be able to lighten the mood with a little bit of playfulness.

如果那个人只是情绪不好（可能是因为你做了什么事情，也可能不是），或许你能通过诙谐的玩笑减轻他的这种情绪。

youdao

Watching his two children come home every night with overstuffed backpacks full of books, he decided his next venture would be to lighten their load.

FORBES: Could Advertising Pay for Your Child's College Education?

As for the foyer: The dark plastered walls are going to be covered up by leather graphite-colored panels to lighten the space and the LED star is going to be exchanged for a more subdued photograph of a tree.

WSJ: The Art of Designing Luxury Model Apartments

Features that had been turned off late last week to help lighten the load on servers would be restored soon, she added.

BBC: EA apologises over 'dumb' SimCity launch