to become attached to sb/sth 变得依附于
antibodies that latch onto germs
依附于细菌的抗体
latch on to (something) or latch onto (something)
a : to grab and hold (something)揪着；紧抓
He latched onto her arm and wouldn’t let go.
他揪着她的胳膊不放。
— often used figuratively常用作比喻
The news media has latched on to the scandal.
这家新闻媒体揪住这个丑闻不放。
b : to begin using or doing (something) in an enthusiastic way（兴致勃勃地）开始使用，开始做
Many companies have latched onto [=adopted] the trend of using consultants.
许多公司都开始赶潮流聘请顾问。
: to choose (something) in an enthusiastic way（兴致勃勃地）选择，挑选
He latched onto music as a way to relax.
他倾情地选择音乐来放松自己。