switchback
n.
in reference to zig-zag railways, 1863, from switch, v. + back, adv.. As an adjective from 1873.
| 词汇 | switchback |
| 词根词缀 | Online Etymology Dictionary switchback n. in reference to zig-zag railways, 1863, from switch, v. + back, adv.. As an adjective from 1873. |
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