force是否为可数名词课本上有一个词组magnetic forces,这是怎么回事
6个回答

force

[fɔ:s]

n.

一、力; 力量; 力气 (不可数)

She lacks force.

她没有力气.

二、武力; 暴力(不可数)

We had to use force to get into the house.

我们不得不强行进屋.

三、影响力; 效力 (不可数)

Decisions of the Congress have force of law.

国会的决议具有法律效力.

四、一群人; 部队; 兵力 (只有复数形式)

The navy is one of the armed forces.

海军是三军之一.