gòu / mǎi / lǜ / sè / shí / pǐn / shí / yě / yào / chá / kàn / bāo / zhuāng / shàng / de / rèn / zhèng / biāo / zhì

购买绿色食品时，也要查看包装上的认证标志。

When buying organic food, you should also check the certification mark on the package.