指定了超时当打开串口否则块永远如果没有换行符，收到。

Do specify a timeout when opening the serial port otherwise it could block forever if no newline character is received.

youdao

否则，它访问能够提供内存的Chunk，清空块的请求数目，并返回第一个被分配的块的位置。

Otherwise, it accesses the Chunk that can provide the memory, clears the required number of blocks, and returns the location of the first allocated block.

youdao

在温度比较高的水中浸泡一块布，当然水温不能太高否则会烫坏皮肤，应该是那种令人不舒服而又不会烫坏皮肤的温度。

Soak a wash cloth in very hot water. This should be not so hot that it burns your skin, but should, nevertheless, be almost uncomfortably hot.

youdao