The concentrations of 300 mg/L and 400 mg/L ethephon reduced the contents of chl a,chl b and carotenoid, and the activity of malic enzyme, and the decreases were greater with the concentrations of ethephon applied in the treatment.是什么意思_The concentrations of 300 mg/L and 400 mg/L ethephon reduced the contents of chl a,chl b and carotenoid, and the activity of malic enzyme, and the decreases were greater with the concentrations of ethephon applied in the treatment.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句