Difference of comparative costs
[经] 比较成本差
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
comparative
[kəm'pærətɪv]
adj. 比较（上）的;按比较估计的;相当的，还可以的;
n. [语]（形容词或副词的）比较级形式;可匹敌者，可比拟物;
com共同+par看见+ative...的 →看见共同之处的→比较的
n. 费用；诉讼费；损失（cost的复数）
🗣️ 情景例句
I have the key, but it doesn't work.
我有钥匙， 但是开不开箱子。
I know what you mean.
我懂你的意思。
In August, she was struck by a very heavy storm during which her rudder was torn away.
8月份“卡蒂萨克”号遭到一场特大风暴的袭击，失去了一只舵。