kē xué jiā / mù qián / hái méi yǒu / fā xiàn / néng gòu / xiàng / dì qiú / yí yàng / cháng qī / gōng / rén lèi / jū zhù / de / rén zào xíng xīng

科学家目前还没有发现能够像地球一样长期供人类居住的人造行星。

Scientists have not yet discovered an artificial planet that can support human habitation for a long time like Earth.