Euchorda
真嵴索動物亞門
??? 情景例句
How is your tennis coming along?
你的網球打得怎么樣？
Small gains bring great wealth.
小益聚大財，薄利成巨富。
The real dividing line between continents and oceans occurs at the foot of a steeper slope.
大陸和海洋的真正分界線是在陡坡腳大陸架慢坡