🧩 词语组成解析
[医] 松果松
🗣️ 情景例句
We'll open a letter of credit if you promise to effect shipment one month earlier.
如果你方答应提前一个月交货，我们就同意开信用证。
How much will it cost?
这种商品成本价是多少？
I was very glad when the boys won the relay race.
我非常高兴，男同学在接力赛中获胜。