Peter only just came in time to prevent the goat from falling down over the very edge.
彼得刚好及时赶到，防止山羊从悬崖边上掉下去。
Peter Milgrom: Xylitol is an antimicrobial, so it's acting against the bacteria themselves, so it helps prevent tooth decay.
彼得·米格罗姆：木糖醇是一种抗菌剂，所以它本身就抗菌，有助预防蛀牙。
Peter Milgrom: Xylitol is an antimicrobial, so it's acting against the bacteria themselves, so it helps prevent tooth decay.
彼得·米格罗姆：木糖醇是一种抗菌剂，所以它本身就抗菌，有助预防蛀牙。
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