就不当真
Don't take it seriously
以上为机器翻译结果，长、整句建议使用 人工翻译 。
如果奈特利先生开始说的时候还不是很当真，说到后来就不能不当真了，因为他的提议被对方欣喜地抓住不放了。
If Mr. Knightley did not begin seriously, he was obliged to proceed so, for his proposal was caught at with delight;
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