coach

Compared meaning: someone who trains a person or animal (noun).

比较义项：训练、指导（某人或某事物掌握技能）（名词）。

• coach 本词

  Used specifically for someone who trains a person in a sport or skill, focusing on teaching and improving human performance; the standard word for a sports instructor.

  专指训练某人从事体育运动或技能的人，侧重教学和提高人的表现，是体育教练的标准说法。

  The tennis coach spent every afternoon improving her serve.

  这位网球教练每天下午都在帮她提高发球技术。

• handler

  Usually refers to someone who trains and controls an animal, or informally manages a fighter or performer; implies handling and directing rather than general skill teaching.

  通常指训练并驾驭动物的人，或非正式地指为拳手、表演者打理事务的人，强调“驾驭、掌控”而非泛泛的技能教学。

  The dog handler trained the puppy to sit and stay.

  这位训犬员训练小狗坐下和待命。

Coach and handler can both mean someone who trains a person or animal. Coach specifically trains a person in a sport or skill, focusing on teaching and improving performance. Handler usually trains and controls an animal, like a dog, or informally manages a fighter's affairs.

coach 和 handler 都可以指“训练某人或某物”的角色，但 coach 专指训练运动员或学习者提高技能的教练，对象是人；handler 在这一义项里通常指训练并驾驭动物（如训犬员），或非正式地指为某位运动员打点事务、指导比赛的人，语气更偏向“操控、管理”。这里不比较 handler 的“处理人”“操纵者”等其他义项。

Compared meaning: a large vehicle for carrying passengers (noun).

比较义项：载客的大型车辆（名词）。

• bus

  Bus refers to a large vehicle used for local transport within a city or town, running a fixed route with frequent stops.

  bus指用于市内或城镇内的大型交通工具，沿固定路线行驶，且经常停靠。

  He takes the number 12 bus to the office every weekday morning.

  他每个工作日早上都乘坐12路公交车去上班。

• coach 本词

  Coach refers to a large, comfortable vehicle used for longer intercity or touring trips, typically making few or no stops along the way.

  coach指用于城际或旅游等长途行程的舒适大型车辆，途中通常很少或不停靠。

  The school hired a coach to take students on the trip to the mountains.

  学校租了一辆长途客车带学生去山区旅行。

Bus and coach both mean a large vehicle for carrying passengers. Bus usually means local transport within a city, running a fixed route with frequent stops. Coach means a comfortable vehicle for longer trips between cities or for touring, with few stops.

这两个词都指载客的大型车辆，但bus通常指市内公交车，沿固定路线频繁停靠；coach则指长途大巴或旅游大巴，行程更长、停靠更少。这里不比较coach作“教练”的义项。