P-55
[医] 羟孕酮酯
🧩 词语组成解析
fifty-five
🗣️ 情景例句
We spent a lot of time fishing together.
我们以前常常一起钓鱼。
I'm boating at the lake.
我在湖边划船。
many of them serious and senior scientists---- who dream of sending people to it.
其中的不少人是认真和资深的科学家，他们一直梦想着把人送上火星。