理解了这一点，我们就可以明白为什么我们把动物视做商品，且总是感到向纯素饮食和生活方式的转变是如此困难。
Understanding this, we can see why we view animals as commodities and often find it difficult to switch to a vegan diet and lifestyle.
视垃圾原料和系统设计而定，沼气通常含有55%至75%的纯沼气。
Depending on the waste feedstock and the system design, biogas is typically 55% to 75% pure methane.
在分析电路的时候，不论是粗略分析还是借助于SPICE这样的软件，通常都会视电阻器为纯电阻。
When we model a circuit, either informally or with a program such as SPICE, we generally assume that a resistor is a simple resistant.
在分析电路的时候，不论是粗略分析还是借助于SPICE这样的软件，通常都会视电阻器为纯电阻。
When we model a circuit, either informally or with a program such as SPICE, we generally assume that a resistor is a simple resistant.
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