[数] 简单闭合的
... 简单本征值 simple eigenvalue 简单闭合的 simply closed 简单闭曲线 simple closed curve ...
数千计的工厂就此关门大吉。
And others have simply closed the doors forever.还有一些只有关门大吉了。
Someone had offered to buy my business earlier, but I could not contact them, so I simply closed it down.有人想接管我的生意,但是我们没有联系到他们,所以我只能直接关门大吉。