题目
There are two main things that make aircraft ...
please translate
There are two main things that make aircraft engineering difficult; the need to make every part as reliable as possible and the need to build everything as light as possible,
please translate
There are two main things that make aircraft engineering difficult; the need to make every part as reliable as possible and the need to build everything as light as possible,
提问时间：2021-04-02
答案
主要有两方面的事使飞机工程困难
必须使每个部分尽可能可靠
并使一切建造得尽可能轻
必须使每个部分尽可能可靠
并使一切建造得尽可能轻
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