Underproper
vt. 从下面支撑；支持；维持：
🗣️ 情景例句
His house was always neat.
他家经常都是干净的。
This part of the country is very flat.
这个国家这一部分很平坦。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之，如果恒星很小，维持生命的行星就要在离恒星很近的轨道上运行，而且要有极好的条件才能使生命得以发展，