- by contrast 相比之下，与之相比；
- in contrast 与此相反
- contrast n.对比；对照；反差；明显的差异 v.对比；对照；形成对比
在语义上 by contrast 和 in contrast 没有区别， 但是在用法上有区别。 in contrast 后面通常要跟to something或者with something，比如：
In contrast to Amy, Jack isn’t a hard-working student.
而 by contrast 通常做表示句子之间逻辑关系的副词性短语放在主语前后，且通常用逗号隔开，比如：
Amy works very hard. Jack, by contrast, is quite lazy.
- at that time 在那时、在当时
At that time, Bush said, there were "no terrorists" presently in the CIA program.
- thus 因此
thus, they came back
- in addition to 除了，除。。之外
In addition to a small number of the company's brand will give users the impression, most brands do not take root in the hearts of users.
除了少数几个公司品牌能给用户留下一点印象外，大多数品牌还无法在用户的心中扎根
