preplanetary nebulas
plural of preplanetary nebula
An independent city in Saxony, Germany / The Leipzig Glossing Rules or glossing style, a style of glossing used by linguists.
A child sacrificed in a religious ritual in some pre-Columbian cultures.
(pharmacology) A drug C₉H₁₃N₃O₃ which inhibits the replication of HIV and is formerly used in the treatment of AIDS, especially in combination with zidovudine. It is a synthetic analog of a pyrimid...
天文学者たちは赤外線望遠鏡を使って、いくつかの前惑星状星雲を取り巻く複雑な塵の殻を研究した。
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