let down
US /let daʊn/
UK /let daʊn/

句動詞
1.
がっかりさせる, 期待を裏切る
to disappoint someone by failing to do what they expect or hope
例:
•
I promised to help him, and I don't want to let him down.
彼を助けると約束したし、彼をがっかりさせたくない。
•
She felt completely let down by her friends.
彼女は友達に完全にがっかりさせられたと感じた。
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