| Expression | 锅炉内壁要洗刷一下，除去钙质沉淀物。 |
|---|---|
| Meaning | The boilers will have to be scoured out to remove the calcium deposits. |
| Reading | guō lú nèi bì yào xǐ shuā yī xià， chú qù gài zhì chén diàn wù。 |
Tags: hsk4-limited4-part3
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