因此当我遇见主人向客厅走来时,我也没说什么,我却径自转回,去听听他们是不是在一起重新开始争吵。
Therefore I said nothing when I met the master coming towards the parlour; but I took the liberty of turning back to listen whether they would resume their quarrel together.
You guys probably know that too from your days at the daycare, but I want to derive the formula and put it up, then we'll see how to use it.
你们可能从幼儿园起就已经知道这个式子了,但是我想重新推导一遍,再来看如何进行运用
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