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1000-hours/sounds-of-american-english/2.2.5-fv.md

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+# 3.2.5 `f/v`
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+与 `k/g` 不一样，`f/v` 的发声重点是可以看到的：下嘴唇略微收回，上牙贴在下嘴唇上，而后开始发音。
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+Unlike `k/g`, the articulation of `f/v` is actually visible: the *lower lip* retracts slightly, and the *upper teeth* rest on the lower lip before beginning to sound.
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+==这里需要图片==
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+韩语中没有这两个音，所以，他们会不由自主地用 `p` 替代 `f`，用 `b` 替代 `v`；所以，我们经常会听到韩国人把 *photo* 说成 `/ˈpoʊˌtoʊ/`，把 *video* 说成 `/ˈbɪdioʊ/`……
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+The Korean language lacks these two sounds, so Koreans will instinctively replace `f` with `p` and `v` with `b`. As a result, you often hear Koreans pronouncing *photo* as `/ˈpoʊˌtoʊ/` and *video* as `/ˈbɪdioʊ/`...
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+中国南方有些方言里也没有 `f`，所以，他们可能会用 `hw` 替代 `f`，比如，把 *fight* 读成 `/hwaɪt/`；中文的普通话里没有 `v`，所以，中国人经常把用 `w` 替换 `v`，比如，把 *very* 读成 `/ˈwɛri/`……
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+Some dialects in southern China also lack the `f` sound, so speakers might substitute `f` with `hw`. For instance, they might pronounce `fight` as `/hwaɪt/`. Mandarin Chinese doesn't have a `v` sound, so Chinese speakers often replace `v` with `w`, like pronouncing `very` as `/ˈwɛri/`...
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+另外需要注意的是，与 `p/b`、`t/d`、`k/g` 不一样，`f/v` 在发声的时候**不带**任何轻微的元音音色。
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+Another thing to note is that, unlike `p/b`, `t/d`, and `k/g`, `f/v` are pronounced *without* any slight vowel qualities.