Xs或 X's,X级电影, 成人电影(十八岁以下儿童不得观看)
The motion (ie for debate) was proposed by Mr X and seconded by Mrs Y. 那动议经X先生提出有Y夫人附议。
Ms X has been named for the directorship/named as the new director. 某女士已被提名任董事职务[任命为新董事]。
What does x represent in this equation? 这个方程式中的x代表什么?