The safety of our workers must always come first, no matter the cost.

真空不仅仅是空的空间，而是一个具有自身物理特性的复杂实体。

Understanding the fundamentals is key to mastering any complex system.

A good composition is like a good conversation - every element has its place and purpose.

与其后来替一个人婉惜，不如先嘲笑他算了。

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