Pyrethrosin
除虫菊精
🗣️ 情景例句
Challenge, the feeling of accomplishment, and knowing that you have made a contribution.
挑战，成就感和知道自己做出了贡献。
A joke never gains an enemy but often loses a friend.
开玩笑总不能化敌为友，反而有时会失去朋友。
he hardly ever used it, preferring always to go on foot.
但却很少使用，常常喜欢以步代车。