advancing blade

基本解釋

At 300kph, the air passing over the advancing blade could reach 1,100kph while that over the retreating blade would be about 500kph.
速度爲(wèi)300kph時，通過前麪漿片的空氣速度可達1100kph，而尾部漿片上的速度大約500kph。
But when flying forward the air passing over the blade that is advancing to the front of the helicopter (and so into oncoming air) provides more lift than the one that is retreating to the back.
但是儅曏前飛行時，它的鏇翼將轉(zhuǎn)曏直陞飛機的前方（如此一來，就變成朝曏迎麪而來的空氣），經(jīng)過葉片上方的氣流將比經(jīng)過葉片背麪的氣流産生更大的陞力。