1. in case conj. 万一；假使

In case studies there are no right answers but there are many wrong ones.
在案例研究中，不存在正确的答案，但有许多错误的答案。

2. against

1. 相反；反对；违反；违背；逆：

against one's will 违心地，违背意愿地

to fight against evil 同邪恶做斗争

2. 撞击；撞着，碰着，顶着，触及，与……相撞，同……冲突：

to push against the door 用力推门

3. 跟……接触

to throw the ball against the wall 用球击墙

4. 逆行，逆……方向，对着；跟……反方向

to drive against the traffic（汽车）逆行

against the current 逆流

5. 与……（形成）对照，与……衬托；以……为背景

green against the gold 金黄色打底的绿色

6. 与……对比，表示对比关系

He was elected by a majority of 30 votes against 15. 他以30票对15票的多数当选。

7. 紧贴着，紧靠着；毗连；倚靠，凭

the house against the church 教堂隔壁的房子