立彬の日本語
地球の表面の５分の１は永久凍土層に覆われている。
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One fifth of the earth's surface is covered by permafrost.
地球表面的五分之一被冻土覆盖了。
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地球， ちきゅう
1. Earth, the globe
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分の， ぶんの
1. -th (e.g. one fifth)
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永久凍土， えいきゅうとうど
1. permafrost
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層， そう
1. layer, stratum, seam, bed
2. class, stratum, bracket, group
3. sheaf
4. counter for stories (of a building)
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覆う， 被う， 掩う， 蔽う， 蓋う， おおう
1. to cover, to hide, to conceal, to wrap, to disguise
遮盖，隐藏，掩盖，包裹，伪装
の
1. indicates possessive
2. nominalizes verbs and adjectives
3. substitutes for "ga" in subordinate phrases
4. (at sentence-end, falling tone) indicates a confident conclusion
5. (at sentence-end) indicates emotional emphasis
6. (at sentence-end, risi...
句尾起强调作用；助词，表示所有关系
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
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