Id-50
[医] 平均感染量, 半数感染量
🧩 词语组成解析
id
[['ai'di:]]
n. 遗传素质, 本能冲动\\n[计] 识别, 标识符, 项目说明
fifty
🗣️ 情景例句
It's not what I hoped for.
我期待的可不是这样的。
To run a race
竞争
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之，如果恒星很小，维持生命的行星就要在离恒星很近的轨道上运行，而且要有极好的条件才能使生命得以发展，