Constant cost lines
[經] 等成本線
?? 詞語組成解析
cost
[k?st]
n. 價錢，代價;花費，費用;犧牲;[用復數][法律]訴訟費;
vi. 價錢為，花費;估計成本;
vt. 付出代價;估價;使喪失;使付出努力;
lines
[[lainz]]
n. 臺詞
??? 情景例句
He is quick-witted.
他反應靈敏。
How many boxes are you going to use?
你要用幾盒？
The swallow shares the virtues of both schools in highest measure.
燕子充分兼有這兩類鳥的長處，