| 正面 | 3108.ratio 英 ['reɪʃɪəʊ]美 ['reʃɪo]     |
|---|---|
| 背面 |     释义： 分析：ra——“热爱”的拼音首字母；ti——“踢”的拼音；o——外形像球。记忆：热爱踢球的人在人群中的比率还是很高的。n. 比率，比例 例句： 1. In 1978 there were 884 students at a lecturer/student ratio of 1:15.1978年有884名学生，师生比为1比15。 ratio 比率，比例来自拉丁语 ratio,思考，计算，部分，词源同 rate.-io,名词后缀。引申词义比率。 ratio (n.)1630s, "reason, rationale," from Latin ratio "reckoning, numbering, calculation; business affair, procedure," also "reason, reasoning, judgment, understanding," from rat-, past participle stem of reri "to reckon, calculate," also "think" (see reason (n.)). Mathematical sense "relationship between two numbers" is attested from 1650s." |