Cost constraint
[計] 成本約束
?? 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;
??? 情景例句
Who's running against him?
誰與他競選
Went on to get his master's degree from harvard.
然后在哈佛大學取得了學士學位。
Around the year 1600 the first horses were brought to the American continent by the Spanish.
大約在1600年的時候，西班牙人把第一批馬匹帶來美洲大陸。