The evidence against her was insubstantial.对她不利的证据不够充分。

Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide.火星的大气层非常稀薄, 几乎完全由二氧化碳组成。

Her limbs were insubstantial, almost transparent.她的四肢非常纤弱, 几乎是透明的。

The project had already cost a not insubstantial amount of money.该项目已耗费了不菲的资金。