| 词汇 | on |
| 词根词缀 | 词源： O.E. on, unstressed variant of an "in, on, into," from P.Gmc. (cf. Du. aan, Ger. an, Goth. ana "on, upon"), from PIE base *ano "on" (cf. Avestan ana "on," Gk. ana "on, upon," L. an-, O.C.S. na, Lith. nuo "down from"). Also used in O.E. in many places where we would now use in. From 16c.-18c. (and still in northern England dialect) often reduced to o'. Phrase on to "aware" is from 1877. 词根记忆： a. 连接上prep.在…上;靠近ad.向前,继续The street lights are usually turned on at 7:30.街灯通常七点半开. |
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