You may want to note that this is the first volume, and that the second volume is also worth getting: Calculus, vol. 2: Multi-Variable Calculus and Linear Algebra with Applications.
你会发现这是他它的第一卷，并且第二卷也值得去读：微积分卷2：多远微分与与线性代数及其应用。
2
Constant volume may hide the variable importance of what was said.
持续不变的噪音量可能导致说话内容重要性的变化情况被隐藏。
3
Variablevolume piston pump. Swash plate design allows for high efficiency and low noise.