chugged

发出低沉的爆炸声。

To make dull explosive sounds.

一边发出这种声音一边移动或旅行。

To move or travel whilst making such sounds.

以平稳但不太快的速度移动或行进。

To move or travel at a steady, although not especially fast, pace.

艰难地运转或表现,通常因资源不足或性能限制。

To function or perform with difficulty, typically due to inadequate resources or performance limitations.