piping

Compared meaning: a tube that carries liquid or gas (noun).

比较义项：管道（n.）。

• pipe

  Pipe is a countable noun for a single tube; you say 'a pipe' or 'several pipes' when talking about one specific conduit.

  pipe 是可数名词，指单根管子，可以说“a pipe”（一根管子）或“several pipes”（几根管子），指某一条具体的管道。

  A cracked pipe under the sink caused the leak.

  水槽下面一根破裂的管子导致了漏水。

• piping 本词

  Piping is usually uncountable and refers to a whole system or run of pipes, or the material they are made of, rather than one single tube.

  piping 通常是不可数名词，指整套管道系统或管道所用的材料，而不是单独的一根管子。

  The plumber replaced all the old piping running through the walls.

  水管工把墙里所有老旧的管道系统都换掉了。

Pipe and piping both mean a tube for carrying liquid or gas. Pipe is countable: a pipe, several pipes. Piping is usually uncountable, meaning a whole system of pipes, or the material itself. Other senses, like piping hot or a smoking pipe, are not compared.

这两个词都表示“管道”，但用法不同：pipe 指单根管子，是可数名词；piping 则指成套的管道系统或管道材料，通常作不可数名词使用。这里不比较 piping 在“piping hot（滚烫的）”中的用法，也不比较 pipe 的其他意义，如“烟斗”或“风笛”。