【Gwendolyn】評論
The bears are a vocal bunch, but their chirps and other calls have never been recorded at ultrasonic levels.這種熊會聚在一起合唱，但他們的低鳴與其他叫聲都沒有被記錄到超音波。選跟聲音相關的
【確定目標後，專注踏實的實現】評論
(C) receptiverɪs'ɛptɪv (a.)能接納的(D) tactilet'æktɪl (a.)觸覺的,有觸覺的,能觸知的
【Mac Liang】評論
chirp to make a short, sharp, high-pitched sound