主语是The power available from a given quantity of gas ,其中available from a given quantity of gas 是修饰The power 的,意思是来自给定数量的汽油的能量.
谓语是is
宾语是its heating
is directly proportional to 来源于一个句型 be proportional to "与...成比例"
整句意思是"自给定数量的汽油的能量是与它的热量成比例的."
主语是The power available from a given quantity of gas ,其中available from a given quantity of gas 是修饰The power 的,意思是来自给定数量的汽油的能量.
谓语是is
宾语是its heating
is directly proportional to 来源于一个句型 be proportional to "与...成比例"
整句意思是"自给定数量的汽油的能量是与它的热量成比例的."