yī​cì​shēng, liǎng​cì​shú

gradual adaptation

一次生,两次熟 (一次生,兩次熟) yī​cì​shēng, liǎng​cì​shú
gradual adaptation
becoming accustomed to a task, situation, or flavor through repeated exposure or practice
social familiarity
the transition from being strangers to friends or acquaintances through repeated meetings

Sources

Definitions
CC-CEDICT