Ostium primum
[医] 原中隔孔, 原中隔口, 第一中隔孔, 第一中隔口
🧩 词语组成解析
n. 口, 门, 孔\\n[医] 口, 门口
[医]氟硝安定（安眠药，麻醉诱导药），原始的
🗣️ 情景例句
Prices are always negotiable.
价钱总是可以商量的。
Generally speaking, it's cheaper but slower to ship goods by sea than by rail.
总的来说，海运比铁路运输更便宜，但速度慢一些。
I think that maybe his Chinese teacher will give Jim some work to do during the holiday.
我想吉姆的汉语老师也许会给他布置一些假期作业。