treble check的意思

高音檢查

treble chance───三倍的機會

double check───仔細檢查；再次確認；兩子同時將軍

treble clef───高音譜號；最高音部之音域

treble clefs───高音鍵

treble chances───三倍的機會

double checks───仔細檢查；再次確認；兩子同時將軍

doubled check───仔細檢查；再次確認；兩子同時將軍

doubles check───仔細檢查；再次確認；兩子同時將軍

spelled check───[計][語]拼寫檢查

Twice she turned from him, and again turned back to make a double and treble check.

I think they should double check and treble check to make sure some one doesn't escape.