切勿 be sure not to 切勿倒置 do not turn over; keep upright; 切勿干燥 keep wet; 切勿受潮 keep dry; 切勿投掷 no dumping; no shooting; 切勿压挤 do not crush; 切勿坠落 do not drop; no dropping; 切勿听信谣言。 don't believe rumours
坠落 fall; drop 飞机向地面坠落。 the airplane fell towards the earth.; 坠落高度 height of fall; 坠落试验 drop shutter test
切勿用“ it’s my secret don’t ask such a personal question