延长: to prolong, to extend, to delay...
乖: (of a child) obedient, well-behaved, clever, shrewd, alert, perverse, contrary to reason, irregular, abnormal...
不但……而且……: Not only... But also......
基本: basic, fundamental, main, elementary...
闪电: lightning...
学年: academic year...
追随: to follow, to accompany...
仔细: careful, attentive, cautious...
开口: to open one's mouth, to start to talk...
寥寥无几: just a very few (idiom); tiny number, not many at all, You count them on your fingers....
