際

友人を選ぶ際(さい)には気を付けるべきだ。

You should be careful in choosing friends.

彼女(かのじょ)の条件(じょうけん)が結婚相手を選(えらぶ)ぶ際(さい)の優先事項だ。

Her conditions for choosing a marriage partner took priority.

離着陸の際(さい)にはシートベルトをしめて下さい。

Please secure your seat belt during takeoff and landing.

予約の際(さい)に聞いた確認番号を私(わたし)に教えて下さい。

Please let me know the confirmation number you were told when you reserved the room.

また辞去する際(さい)に決して忘れないようにすること。

It is very important to be careful not to forget them when you leave.