opportunistic
/ˌɒpətjuːˈnɪstɪk/adjective
1- exploiting chances offered by immediate circumstances without reference to a general plan or moral principle机会主义的：
the change was cynical and opportunistic
该改变是玩世不恭和机会主义的。
1.1
- Ecology (of a plant or animal) able to spread quickly in a previously unexploited habitat【生态】（动植物）能在新的栖息地迅速分布的。
1.2
- Medicine (of a micro-organism or an infection caused by it) rarely affecting patients except in unusual circumstances, typically when the immune system is depressed【医】（微生物）机会感染的。
派生词