由shell执行，然后传递给内核，这个过程通常比编译为纯机器码的二进制程序慢。

Is executed by the shell, then passed to the kernel, which is typically slower than a compiled binary program that is pure machine code.

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其次，本文提出了一个具体可行的混和加密方案：用加密速度快分组密钥AES算法对控制信息加密；用安全性更高但加密速度慢的RSA算法来传递AES算法的密钥。

Then the paper puts forward a blending encryption project: using the AES algorithm to encrypt the controlling data, using the RSA algorithm to transfer the key of the AES algorithm.

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You do it so quickly that the heat flow between the inside of the bicycle pump and the outside is too slow compared to the speed at which you compress.

我们用力很大,于是压缩得很快,打气筒内外热传递的速度,与之相比要慢得多。

麻省理工公开课 - 热力学与动力学课程节选