L.f.d.
[医] 最低致死量(毒素)
🗣️ 情景例句
How many words can you type per minute?
你一分钟能打多少字？
Would you please tell us the price of these electric heaters so as to help us make the decision.
能否告知这些电热器的价格，以便我们作出决定。
Lucy ran faster than Meimei.
露茜比梅梅跑得更快。