latch on
phrasal verblatch on (to something) | latch onto something
latch on (to somebody/something) | latch onto somebody/something (informal)
to become attached to somebody/something 变得依附于 antibodies that latch onto germs 依附于细菌的抗体
to join somebody and stay in their company, especially when they would prefer you not to be with them 纠缠,缠住(某人) to develop a strong interest in something 对…产生浓厚的兴趣