null command造句

例句与造句

1. However , a line containing only spaces or tabs can appear ; this line is interpreted as a null command , and no error occurs
   但是可以出现只包含空格或制表符的行；该行被解释为空命令，并且不出现错误。
2. It's difficult to find null command in a sentence. 用null command造句挺难的