Catalyst precursor composition
[化] 催化剂母体成分
🧩 词语组成解析
precursor
[pri'kɝsɚ]
n. 前辈，前驱，先锋，前任;预兆，先兆，初期形式;[核]前驱波，初级粒子;预报器;
pre…前，预先+curs跑，发生+or名词后缀，表人或物→先跑者→先驱
🗣️ 情景例句
to do things together more--you and I.
也需要多在一起工作， 你和我。
George's father is an attorney.He has his own practice.
乔治的父亲是一个律师，他有他自己的实践经验。
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。