failing
noun [ C ] uk/ˈfeɪ.lɪŋ/ us/ˈfeɪ.lɪŋ/
弱点；缺点
a fault or weakness
His one big failing is that he never says he's sorry. 他的一大缺点是从不肯道歉。
failing
preposition uk/ˈfeɪ.lɪŋ/ us/ˈfeɪ.lɪŋ/
如果不行，若无
if that is not possible
Buy her some flowers, or failing that, just send her a card. 给她买一些花吧，实在不行，就寄一张卡去。
Appointments are available on the 2nd and the 6th of this month but failing either of those, we could fit you in on the 15th. 本月2号和6号可以预约，如果都不行，我们可以为您安排在15号。
failing
adjective uk/ˈfeɪ.lɪŋ/ us/ˈfeɪ.lɪŋ/
衰退中的；逐渐减弱的；渐趋失败的
becoming weaker or less successful
a failing business 日渐衰败的企业
failing eyesight 衰退的视力
In the failing light, it was hard to read the street signs. 天色渐暗，难以看清路标。