记忆方法
1. altern- + -ation.
2. => one after the other, by turns.
3. Alternate means "by turns;" alternative means "offering a choice." Both imply two kinds or things.
2. => one after the other, by turns.
3. Alternate means "by turns;" alternative means "offering a choice." Both imply two kinds or things.
英语词源
- alternation (n.)
- mid-15c., from Old French alternacion, from Latin alternationem (nominative alternatio), noun of action from past participle stem of alternare (see alternate (v.)).
权威例句
- 1. The alternation of sun and snow continued for the rest of our holiday.
- 我们剩余的假期里依旧时而晴天时而下雪。
- 2. Light and shade come in swift alternation ; Days and months flash by as quickly as a weaver's shuttle.
- 光阴似箭,日月如梭.
- 3. There is an alternation of black and white stripes in that cloth.
- 那匹布黑白条纹相间.
- 4. This alternation feature is commonly related to emplacement of C - shaped rolls.
- 蚀变的特征一般同C形的卷型矿化有关.
- 5. These modifications include the chemical alternation of the bases.
- 这种修饰作用包括碱基的化学变化.
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