and its now or never
机不可失，时不再来
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Every now and then a man's mind is stretched by a new idea or sensation, and never shrinks back to its former dimensions.
每隔一段时间，人的思维就会因新思想或新感受而扩展，并且绝不会缩回到原来的尺寸。
youdao
Its now or never, never tomorrow, and never next second!
现在就付诸行动，永远不要等到明天，永远不要等到下一秒！
Zynga grew fast and hard under circumstances that will never exist again, and now its seeing whether or not it can hang onto that growth.
FORBES: Zynga Stock Sinking Along With Facebook -- Is Now The Time to Buy?
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