同饥饿作斗争的父母应该知道他们的孩子每日饮食中需要补充一定的维生素与矿物质。
But parents who struggle to feed their children may need better access to vitamins and minerals to supplement daily meals.
本文叙述了利用碱法制浆废液中的碱木素同苯酚、甲醛缩合制取结构材料粘合剂的方法。
The methods for preparing structural material bonding agent by condensing the alkaline lignin in the wast liquor of soda pulping process with formaldehyde and phenol are described.
叙述了利用碱法制浆废液中的碱木素同苯酚，甲醛缩合制取结构材料粘合剂的方法。
The methods for preparing plywood adhesive by condensing phenol and formaldehyde with alkaline lignin in waste water are described.
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