So if we want to put that in chemical terms, we want to make sure we put these in brackets here, and remember, this is the resonance arrow, it's not a reaction arrow, it's a resonance arrow, so make sure you mark it up correctly like that.

那么如果我们把它类比到化学中来，我们要确保它们都放在括号里，而且要记住，这是一个表示共振态的箭头，而不是表示化学反应的，它是一个表示共振态的箭头，因此请务必像这样正确地标记它。

麻省理工公开课 - 化学原理课程节选

The 24-year-old had to check occasionally with his better-sighted team-mates, practicing on either side, to find out whether his arrow had found its mark.

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Lend a Hand claimed another top three finish for Mark Johnston as he took second, three quarters of a length ahead of Border Arrow, who snatched third by a neck from Xaar.

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