例句與造句

1. An hour later the next lighter stable isotope , xenon 134 , appeared
   一小時(shí)之后，略輕一點(diǎn)的穩(wěn)定同位素氙134出現(xiàn)。
2. It's difficult to find light stable isotope in a sentence. 用light stable isotope造句挺難的