To walk slowly and heavily.

沉重缓慢地走。

To drudge or toil; study laboriously.

辛苦工作；劳役；苦读。

To walk over heavily and slowly.

沉重缓慢地走在...上。

The act of plodding.

步伐沈缓；苦干。

The sound of a heavy step.

沉重的脚步声。