暑さに慣れる
get [【形式ばった表現】 become] used [accustomed] to the heat 《in Tokyo》
新しい環境に慣れる
be acclimatized [《主に米国で用いられる》 acclimated] to one's new environment
〈なじみのない〉 unfamiliar; new
〈経験を積んだ〉 experienced; practiced
〈経験の浅い〉 inexperienced; green
読み方 なれる
To get used to (anything); to grow accustomed to (some work); to become habituated to (dangers); to become inured to (hardships); to become experienced in (teaching); to become practised in (teaching, etc.)