Dinner was two meat dishes and one vegetable dish, H.'s mother's preparations.
H的母亲准备的晚饭，两荤一素。
H: I think there are two reasons. For one thing...
H：我认为这有两种因素。
Now, if we compare these two, we will get the derivative of h.
比较这两个，我们会得到h的导数。
Researchers have tried for two decades to find a microbicide to fight H. I. V. transmission.
研究人员二十年来一直在试图寻找一种抗病毒凝胶能够防治艾滋病毒的传播。
Researchers have tried for two decades to find a microbicide to fight H. I. V. transmission.
研究人员二十年来一直在试图寻找一种抗病毒凝胶能够防治艾滋病毒的传播。
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