收集太阳光是树木生存的关键。
个人生存的关键是保持灵活并积极主动。
The key factor for individual survival is to stay flexible and be proactive.
太空可能是我们生存的关键。
一个看到的是一个生存的关键一环设备。
江豚生存的关键可能是综合性的休渔期（覆盖所有鱼类）。
自信是生存的关键，也是在各行各业领先取胜的关键。
Confidence is a key to win the rat race in every walk of life.
悲伤到底是我们生活中不必要的东西，还是人类生存的关键条件？
Is sadness something we can live without or is it a crucial part of the human condition?
营销不是人类生存的关键，因此你的服务也不是人类生存的关键。
Marketing is not essential to human survival; hence your services may not be either.
抗凋亡方面是一个关键因素生存的一种恶性肿瘤细胞。
Resistance towards apoptosis is a key factor for the survival of a malignant cell.
“适者生存”是物种不断变化的关键。
The "survival of the fittest" was the key to the constant change in species.
要使众多鸟类得以生存，关键是保护好这些重要的栖息地。
Protection of such important resting areas is crucial to many species' survival.
要使众多鸟类得以生存，关键是保护好这些重要的栖息地。
Protection of such important resting areas is crucial to many species' survival.
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