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1000-hours/sounds-of-american-english/2.2.14-lr.md

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 When pronouncing the 'l' sound, the tip of the tongue starts in the same position as it does for 't/d'.
 
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+![articulator-tongue-tip-td](/images/articulator-tongue-tip-td.svg)
 
 `r` 发声时起始的舌尖位置相对更加靠后。
 
+![articulator-tongue-tip-r](/images/articulator-tongue-tip-r.svg)
+
 For the 'r' sound, the tongue's tip begins a bit further back.
 
 `l` 和 `r` 处于音节开头的时候，人们一般不会觉得困难，比如 *lot* 或者 *rot*……
 
 Pronouncing 'l' and 'r' at the beginning of syllables usually is of no difficulty at all, for example in words like 'lot' or 'rot'…
 
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-有一个重要的细节：
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-Here's an important detail to note:
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-> 美式英语中，`r` 发声的时候，舌尖**从不接触**龈脊，只是非常接近龈脊。
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-In American English, when pronouncing the `r` sound, the tip of the tongue *never* actually touches the *alveolar ridge*, but comes very close to it.
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 `l` 的困难总是来自于它们处在音节末尾的时候。
 
 The difficulty with 'l' often arises when it's at the end of a syllable.