vi.

1. 沉重缓慢地走[Q][（+on/along）]
   He plods away at his lessons until he learns them.

   他埋头学习功课直到学会为止。

   The old man plods wearily along the road.

   那老翁迈着沉重的步子沿着大路疲乏地向前走。

2. 努力从事；埋头苦干[Q][（+away/on）]

vt.

1. 沉重缓慢地走（路）

n.

1. 沉重缓慢的行走；吃力的工作
2. 沉重缓慢的脚步声

v.

n.

1. a slow, heavy walk.
2. (also PC Plod) Brit. informal a police officer.