Pentaene
[化] 五烯
🗣️ 情景例句
I remember your parents' first house very well.
我还清楚记得你父母的第一栋房子。
Man has not a greater enemy than himself.
人之大敌，自己而已。
They had to edge their way along this, sometimes wading across shallow streams, or swimming across deep pools.
他们不得不侧着身子往前走，有时过浅溪，有时游过深潭。