Unstable isotope
[电] 不稳定同位素
🧩 词语组成解析
🗣️ 情景例句
He is behind the rest of the class in reading.
他在阅读方面不如班上的其他同学。
Maybe some other time.
也许下一次吧。
Go along this street, and take the second turing on the right.
沿这条街往前走，在第2路口向右拐。