Polystream
多氯苯
🗣️ 情景例句
To enjoy the simple things in life ...
享受人生乐趣……
He that will eat the nut must first crack the shell.
欲所得，必先劳。
It is possible that upon such an occasion a battle ensued, with the sharks being driven away or killed.
双方可能随之发生搏斗，搏斗结果是海豚赶走或咬死鲨鱼。