1. 重大的：
22) momentary 瞬时的, 短时的 | momentous 重大的 |
23) memorable 值得记忆的, 不能忘却的

2. 重大,极重要的：momentary 刹那,瞬息的 | momentous 重大,极重要的 | momentum 运动量,动力

3. 重要的：1. The momentous thing in human life is the art of winning the soul to good or evil.人生中最重要的... | Momentous: 重要的 | 2. Reading maketh a full man; conference a ready man; and writing an exact man...

4. 重大的,重要的：momentary 片刻的,瞬间的 | momentous 重大的,重要的 | monotonous 单调的,枯燥乏味的

1. 重大的;关键的;有影响的
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;If you refer to a decision, event, or change as momentous, you mean that it is very important, often because of the effects that it will have in the future.

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;e.g. ...the momentous decision to send in the troops...
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;派遣部队的重大决定
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;e.g. The past three years have been among the most momentous in world history.
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;过去的3年是世界历史上最重要的时期之一。

adj

1. of very great significance

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;e.g. deciding to drop the atom bomb was a very big decision
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;a momentous event