protoplanet

美 [pro?t?'plæn?t] 　英 [pr??t?'plæn?t]

• n.〔天〕原行星
• 網(wǎng)絡原始行星

詞形變化

復數(shù)：protoplanets  

英漢解釋

n.

1. 〔天〕原行星

英英解釋

n.	1. a theoretical mass of gas in the clouds of gas and dust around a star that is believed to develop into a planet

例句

Gas clusters that push the protoplanet outward can sometimes exert stronger forces than those that push inward.

氣體星團推動原行星向外的推力可能在某些時候強于那些使它向內(nèi)的推力。

Vesta is what scientists term a protoplanet - a body that never acquired the proportions of "grown-up" planets such as Earth and Mars.

灶神星屬于被科學家們稱作“原始行星”的一類星體，這種星體不具備“成熟”行星——比如地球和火星——的尺寸。