对男士来说，可选择的黑领结意味着，如果你喜欢的话，穿无尾晚礼服不会有错，但是，如果你更愿意选择深色西服和领带，这样也不会太随便。

For men, black tie optional means it's not wrong to wear a tux, if you like—but if you'd be happier in a dark suit and tie, you won't be underdressed.

youdao

And you're not counted off for errors that you make in writing, either, if you're writing in French; and it really rocks, trust me.

你在写作里有错,也不会扣分的,如果你用法语写的话,而且这么着可带劲了,真的

耶鲁公开课 - 1871年后的法国课程节选