# 2.2.10. `tʃ/dʒ`

`ʃ/ʒ` 发声时舌尖贴近但没有接触到龈脊的对应部位，`tʃ/dʒ` 则需要舌尖贴到那个部位。

When pronouncing `ʃ/ʒ`, the tip of your tongue should be close to, but not touching, the corresponding area of the alveolar ridge. For `tʃ/dʒ`, however, you need to touch that area with your tongue tip.

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为了让舌尖适应那个部位，不妨反复练习：

To get your tongue used to this position, it's a good idea to practice repeatedly:

> * `ʃ... tʃ... ʃ... tʃ... ʃ... tʃ... ʃ... tʃ... ʃ... tʃ...`
> * `ʒ... dʒ... ʒ... dʒ... ʒ... dʒ... ʒ... dʒ... ʒ... dʒ...`
> * `ʃ... ʒ... ʃ... ʒ... ʃ... ʒ... ʃ... ʒ... ʃ... ʒ...`
> * `tʃ... dʒ... tʃ... dʒ... tʃ... dʒ... tʃ... dʒ... tʃ... dʒ...`