a. 不胡闹的, 严肃的, 讲究实际的
在线英汉词典

no-nonsense的短语、例句：

no-nonsense adj[attrib 作定语] straightforward, sensible and serious 合情合理而坦率认真的
Let´s have a clear no-nonsense agreement to start work as soon as possible. 让我们达成切实可行的协议以尽快开始工作.
She has a firm, no-nonsense attitude towards her staff. 她对下属的态度严肃而认真.