Chemform
链霉素
🗣️ 情景例句
We are lucky to have you, Marilyn.
拥有你是我们的幸运， Marilyn。
I only wear a tie on special occasions.
我只有在特殊场合才带。
but each year, the dogs are still sent out into the snow whenever a traveller is in difficulty.
但每年还要派狗到雪山地里去帮助那些遇到困难的旅游者，