Subgroups
n. 副全宗；亚组, 子组（subgroup的复数形式）
🗣️ 情景例句
And one thing more.
还有一件事。
That's monkey business!
胡闹！
Because of this, we kept looking back, wondering if we were leaving a trail of oil and petrol behind us.
因此，我们不时地掉过头，怀疑车后是否留下了机油和汽油的痕迹。