Because of the postulated incompressibility of the fluid, equal masses of fluid occupy equal volumes.因為有流體不可壓縮的假設, 所以質量相等的流體所占據的體積相等.The incompressibility of the fluid is determined by introduction of a so - called parti...
他看到孩子們打 乒乓, 不覺技癢.Seeing the children playing ping - pong , he itched to have a go.嘻,技至此乎!How wonderful ! What superb skill!有些射手射技很差.Some marksmen shoot badly....