falling-off
noun [ S ] uk/ˌfɔː.lɪŋˈɒf/ us/ˌfɑː.lɪŋˈɑːf/
（数量）减少；（比率）下降；（质量）降低
the fact of a rate, amount, or quantity becoming smaller or lower
Hotels have recorded a falling-off in reservations this summer. 旅馆记录显示今夏预订率下降了。
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