Ichthyornithidae
鱼鸟科
🗣️ 情景例句
About forty minutes, I think.
我想大约40分钟。
You cannot have two forenoons in the same day.
一日之中不可能有两个上午。
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，