看后面接的名词是什么,这里some是用来修饰后面的名词,一般情况下,可数名词就可以用some,反之则不可.所以整句意思应该是：买一些...
for example:buy some apples
buy some time表示"争取时间"或者"拖延时间"之义。
例如:
The speech competition is coming.I need to buy some time to practice my speech.演讲比赛就到了,我需要争取时间练习演讲.
All students are buying some time to get ready for the sports meeting.所有学生都争取时间准备运动会。
