op·por·tun·is·tic
adjective/ˌɒpətjuːˈnɪstɪk/
/ˌɑːpərtuːˈnɪstɪk/
- (also opportunist)(disapproving) making use of an opportunity, especially to get an advantage for yourself; not done in a planned way
机会主义的；投机的；见风转舵的 - [only before noun] (medical) harmful to people whose immune system has been made weak by disease or drugs
机会致病性的（对免疫系统差的人有害） - an opportunistic infection
机会性感染
- an opportunistic infection