太多甜食有害健康。( be harmful to )
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Too much sweet food is harmful to health.
【详解】 sweet food“ 甜食 ” ,不可数名词,用 too much 表示 “ 太多 ” ; be harmful to“ 对 …… 有害 ” , health“ 健康 ” ,不可数名词,故填 Too much sweet food is harmful to health.