想必你一定会在饭后必刷牙，喝花草茶而不喝汽水，吃零食时会用水果来代替甜品。
So you brush your teeth after every meal, choose herbal tea over fizzy drinks, and snack on fruit not sweets.
领唱没来，而代替她的人很明显不十分清楚怎样扮演她的角色。
The leading singer didn't appear, and her substitute clearly didn't know her role very well.
于是较普遍的类型，在生存竞争中便要压倒较不普遍的类型，而代替它们的位置。
Hence, the more common forms, in the race for life, will tend to beat and supplant the less common forms.
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