harmful chemicals.例：一些人同意，并且相信使用自己的筷子较卫生，因为竹筷可能包含了有害的化学物质。" Some agree, believing it is healthier to use your own chopsticks as the wooden kind might contain harmful chemicals.
有害的化学物质Harmful chemical substances例句：自然原因和水污染，都可导致一些鱼类含有有害的化学物质。 Some fish may contain harmful chemicals, which can be the result of both natural causes and water pollution.
