Photolectric thereshold
[電] 光電低限
??? 情景例句
Yes, Miss. I will.
好的，小姐。我會注意的。
I tried to telephone you but I couldn't get through.
我試著打電話給你，但都沒有打通。
Then see which plants grow higher, measure them with a ruler and write down your results.
過后看看哪種西紅柿長得比較高，用尺子量量并記錄下你的實驗結果。