Ld
致死剂量
🗣️ 情景例句
but I think we should face the truth.
但我认为我们应面对现实。
Nature abhors a vacuum.
自然界里是没有真空的。
“I wish I'd known about that rule earlier, she said.
“我要是早点知道这个规矩就好了！”她说。