Four points stand out as being more important than the rest.
有四點比其余各點更為重要。
Don't let this go further than these four walls.
走出屋外這事就不要再談了。
I found it a strain looking after four children.
我覺得照料四個孩子挺累的。
Students will normally take four or five AS subjects.
學生通常要選四門或五門高級證書輔助考試學科。
There are four GPs in our local practice.
在我們地區診所有四個全科醫生。