1. 强迫的：ambitious#有野心的 | forced#强迫的 | curious#好奇的

2. 强制的：forced 强力的 | forced 强制的 | forced-air-cooled 强制空气冷却

3. 被迫的：forced sale 强行拍卖 | forced 被迫的 | forcedly 强迫地

1. 被迫的;强迫的;非自愿的
A forced action is something that you do because someone else makes you do it.

e.g. A system of forced labour was used on the cocoa plantations.
可可种植园中曾实行强迫劳役制。

2. 不得已的;不得不做的
A forced action is something that you do because circumstances make it necessary.

e.g. He made a forced landing on a highway.
他迫降在了公路上。

3. 不自然的;勉强的
If you describe something as forced, you mean it does not happen naturally and easily.

e.g. ...a forced smile...
强挤出来的微笑
e.g. She called him darling. It sounded so forced.
她称他为亲爱的。听起来很不自然。

adj

1. lacking spontaneity
not natural

e.g. a constrained smile
forced heartiness
a strained smile

Synonym: constrainedstrained

2. made necessary by an unexpected situation or emergency

e.g. a forced landing

3. forced or compelled

e.g. promised to abolish forced labor

4. produced by or subjected to forcing

e.g. forced-air heating
furnaces of the forced-convection type
forced convection in plasma generators