General ly speaking, it will be safer only to open the port to be used, but closing port means reducing the function, so we need to keep a balance on security and function.
一般来说，仅打开需要使用的端口会比较安全，不过关闭端口意味着减少功能，所以需要在安全和功能上面做一些平衡。
She was effectual ly prevented but she wasn't on speaking terms with her family for several weeks.
家里人有效地阻止了她，可是事后她有好几个星期不跟家里人讲话。
A person who causes trouble by speaking indiscreet ly.
由于说话轻率而惹上麻烦的人。
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