They need to be living and bonded with the people who have taken responsibility for adopting them.
他们需要与那些承担责任收留他们的人一起生活并惺惺相惜。
Then what you have is a carbon in the middle with three hydrogens around it, and then it can only be bonded to one other thing.
那么你就会有一个碳原子在中心,三个氢原子围绕着它,那么它只能再和一个原子成键。
One crucial advantage of cast polyurethane is that it can be bonded effectively with metals, composites or plastics during or after the moulding process.
浇铸聚氨酯的一个关键性优势是它可以在成型过程中和过程后与金属,复合材料或塑料组件有效粘接。
then what you have is a carbon in the middle with three hydrogens around it, and then it can only be bonded to one other thing.
那么你就会有一个碳原子在中心,三个氢原子围绕着它,那么它只能再和一个原子成键。
应用推荐