| 释义 |
Water and glass are colourless.水和玻璃是无色的。Carbon monoxide is a colourless, odourless, poisonous gas.一氧化碳是一种无色、无味的有毒气体。Carbon monoxide is a colourless, odourless gas.一氧化碳是一种无色无味的气体。Carbon monoxide is a colourless, poisonous gas.一氧化碳是无色有毒的气体。Indoor pollution falls into two categories, that which we can see or smell, and pollution which is invisible and produces no odour.室内污染分为两种：一种是我们能看得见或闻得着的，另一种是无色无味的。 |