Radon is known to be harmful to humans in large quantities.众所周知，大量的氡会对人体造成伤害。Such chemicals taken up by plants can be harmful to humans and animals.这种化学物质被植物吸收上来,就可能对人畜产生危害.Generally speaking, natural obesity should not ...

妨害...

be harmful to的音标：be harmful to的英式发音音标为：[bi: 'hɑ:mfəl tu:]be harmful to的美式发音音标为：[bi 'hɑrmfəl tu]...