when, on the occasion of
During an argument with her husband, she became very agitated and suddenly burst into tears.
手紙を書く際の最善の方法は、心にあることを何でも書き留めることだ。
The best way to write a letter is to put down whatever is on your mind.
あなたの町へ今度旅行する際、あなたにお会いするのが楽しみです。
I’m looking forward to seeing you when I travel to your town next time.
When speaking English, you shouldn't be afraid of making mistakes.