protoplanets

protoplanets

美 　英

• n.〔天〕原行星

词形变化

复数：protoplanets  

英汉解释

n.

1. 〔天〕原行星

英英解释

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

While the protoplanets were coming into existence the sun was still dark.

当原行星刚刚形成时，太阳还是暗淡无光的。

When protoplanets accrete more material, the energy at impact causes local heating.

当微行星增加更多的物质，撞击的能量会造成局部的加热。

These were the protoplanets from which the planets of the present developed.

这些就是原行星，现在的行星正是从它们演化而来的。

In this way the number of protoplanets lessened.

这样protoplanets的数量变小了。

These protoplanets would gradually exert a gravitational pull on the local volume of space, pulling in more and more material.

这些原行星会逐渐在原太空中施加引力，吸收越来越多的物质。

Model suggests how protoplanets kept a safe distance from the sun

动态模拟证明原行星是怎样保持与太阳之间有一个安全的距离。