常見例句雙語例句And base on the experiment, calculating formula of cross section mean velocity's reduction after planting and bed shears stress of vegetation dam block are established.同時在試驗的基礎(chǔ)上，推導(dǎo)得植樹后斷面平均流速減小值和植物壩段床面剪應(yīng)力的計算公式。 返回 block shears