suffice:
不及物动词 vi. [W]
1.足够[(+for)]
Her income suffices for her needs.
她的收入足够她用。
2.【旧】有能力

及物动词 vt.
1.使满足,满足...的需要[W]
Some bread and soup will suffice me.
一些面包和汤就够我吃的了。

because和because of的区别：
because+句子
because of+名词

because 后边要接一个完整的句子
because of 后边一定要接一个不是句子的句子（短语）
例如：I didn't go to school because i am ill.
I didn't go to school because of my illness.

vengeance:
名词 n.
1.报复;报仇,复仇[U][S1][(+on/upon)]
Herbert swore vengeance on the murderers of his father.
赫伯特发誓要向谋杀他父亲的凶手们报仇。

how far 和how long的区别：
how far 的意思是多远，一般引导提问路程的特殊疑问句
例：How far is it from your home to school? 你家到学校有多远？

how long 的意思是多长时间，一般引导提问时间的特殊疑问句
例：How long have you been in America? 你在美国呆了多久？

stop to do sth是停止正在做的事，去做另一件事
stop doing sth是停止正在做的的事