| Expression | 天底天球上,在观测者垂直向下的一点,与天顶完全相对 |
|---|---|
| Meaning | A point on the celestial sphere directly below the observer, diametrically opposite the zenith. |
| Reading | tiān dǐ tiān qiú shàng, zài guān cè zhě chuí zhí xiàng xià de yī diǎn, yù tiān dǐng wán quán xiāng duì |
Tags: hsk3-limited3-part4
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