prep.

1. 在……里，在……上
   The two brothers study in the same class.

   两兄弟在同一个班里上课。

   The telephone is in the little study on the ground floor.

   电话在一楼的小书房内。

2. 在……之内；在……方面
   He is lacking in courage.

   他缺乏勇气。

3. 从事于；参加着
   She is in business.

   她做生意。

4. 穿着，戴着
   He is dressed in black.

   他穿黑衣服。

5. 朝，向
   She hurried away in the opposite direction.

   她朝相反的方向匆匆离去。

6. （表示手段、方法、材料）用，以
   They paid in cash.

   他们用现金支付。

7. 在……期间；在……以后
   He'll come back in a week.

   他将于一周之后回来。

   I haven't met her in a long time.

   我好长时间没有遇见她了。

8. 处在……中
   The room was in disorder.

   房间里乱七八糟。

9. （表示数量、程度、比例）按，以；在……中
   One child in twenty has this disease.

   二十个小孩中有一个患有这种疾病。

10. 在……身上，在……上
    In him I see a future leader.

    在他身上我看到了一个未来的领袖人物。

11. （表示过程）在……当儿；在……过程中
    The work is in progress.

    这工作正在进行中。

12. （表示动作的方向和结果）进入到……中；成，为
    He pushed a button and set the machine in motion.

    他按下按钮开动了机器。

ad.

1. 进；在里头
   Please come in.

   请进。

2. 在屋里；在家
   I called on him; but he wasn't in.

   我去拜访他，但他不在家。

3. （车、船、季节等）已到达，已来临
   Spring is in at last.

   春天终于来了。

4. （庄稼）已收进；已成熟
   The wheat crop is in.

   小麦收进来了。

5. （服装等）时髦
   Miniskirts are in again.

   迷你裙又时髦起来了。

6. 当政；当选
   The Democratic Party is in.

   民主党执政了。

7. 【板】轮到击球，【网】（球）在界内
8. （加）入，（搀）入

a.

1. 在里面的；朝里面的[B]
   I found the letter in my tray.

   我在文件盘里发现了这封信。

2. 【口】时髦的，流行的；赶时髦的[B]
   These clothes are the "in" thing now in Los Angeles.

   这些衣服在洛杉矶正流行。

   the in crowd

   赶时髦的一群

   This is the in thing to wear this season.

   这是这一季最流行的穿着。

   She mixed with the in crowd.

   她与时髦阶层交往。

3. 【口】限于小圈子的[B]
   It was an in joke.

   这是小圈子里的一个玩笑。

4. （火等）燃烧着的；（灯）亮着的[F]

n.

1. 当朝派；执政者[P1]
2. 【美】【口】门路，关系[C]

prep.

1. expressing the situation of being enclosed or surrounded by something.
2. expressing motion that results in being within or surrounded by something.
3. expressing a period of time during which an event happens or a situation remains the case.
4. expressing the length of time before a future event is expected to happen.
5. expressing a state, condition, or quality.
6. expressing inclusion or involvement.
7. indicating someone's occupation or profession.
8. indicating the language or medium used.
9. expressing a value as a proportion of (a whole).

adv.

1. expressing movement that results in being enclosed or surrounded by something.
2. expressing the situation of being enclosed or surrounded by something.
   ▸present at one's home or office.
   ▸Cricket  batting.
3. expressing arrival.
4. (of the tide) rising or at its highest level.

adj.