closed chain
n. 闭链
例句与用法：
Fishing is a closed book to me.
我对钓鱼是一窍不通。
Nuclear physics is a closed book to me.
核物理学是我完全不懂的一门学科。
Nuclear physics is a closed book to most of us.
我们大多数人对原子核物理学一窍不通。
ph.
【化】闭链
closed chain
n. 闭链
例句与用法：
Fishing is a closed book to me.
我对钓鱼是一窍不通。
Nuclear physics is a closed book to me.
核物理学是我完全不懂的一门学科。
Nuclear physics is a closed book to most of us.
我们大多数人对原子核物理学一窍不通。
ph.
【化】闭链