词根:cheap
adj.cheap 便宜的;小气的;不值钱的
adv.cheap 便宜地
n.cheapness 廉价
6.This was an important innovation, because the camel's abilities to thrive in harsh desert conditions and to carry large loads cheaply made it an effective and efficient means of transportation.
这是一项重要的创新,因为骆驼能够在恶劣的沙漠条件下茁壮成长,并以低廉成本搬运大量货物,这使它成为一种有效且高效的运输工具。