短语词组短語thin -out 尖滅thin out the crude 降低原油粘度crown thin out 疏剪樹冠thin out maize seedlings 間玉米苗thin out the seedlings 間苗thin out seedling 按一定的株距畱下作物的幼苗thin out trap 尖滅圈閉thin out millet seedlings 間穀子苗thin out of coal seam 煤層尖滅 返回 thin out