1.a stalk by which a leaf is attached to a stem.
1.Any of several trees of the genus Populus having leaves attached by flattened leafstalks so that they flutter readily in the wind.
白杨一种树白杨属，叶长在扁平的叶柄上，因此易于随风飘动。
2.Some elements vary considerably in different kinds of grapes with high levels in leafs and leafstalks.
不同葡萄品种间植株中个别元素含量有显著的差异，叶片、叶柄元素含量均远远高于果实。