比赛进入关键时刻，每个人都看得很紧张。

Bǐsài jìnrù guānjiàn shíkè, měi gèrén dōu kàn de hěn jǐnzhāng.

The game entered a critical moment and everyone watched very nervously.

成功的关键因素是永不放弃。

Chénggōng de guānjiàn yīnsù shì yǒng bù fàngqì.

A key element to success is never giving up.

要取得进步的关键就是耐性。

Yào qǔdé jìnbù de guānjiàn jiùshì nàixìng.

The key to progress is patience.