单词：upsilon
音标：['ju:psilɒn] ；
n. 希腊语第20个字母
n. the 20th letter of the Greek alphabet
词型变化：名词复数形式 : upsilons
词性分布：
单词：upsilon 相关文章
Part 2. Astronomers discover solar system. Keywords. another solar system, planets, challenge. Vocabulary. constellation, astronomy, full-fledged, Jupiter. A. Listen to a science report, write down the information about the new solar system. What sci
发表于:2019-02-15 / 阅读(38) / 评论(0)
Step by Step 3000 第二册
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