场景分类训练下生物第十篇spider% V$ P8 |0 _+ H2 s
and store the nutrient  in her extra unfertilized eggs(是指未受精卵吗？）这句话什么意思？0 m( J% t  a1 m
that's when nutrient stored in those extra eggs begin to seep in mother's bloodstream这句话是什么意思，怎么理解？

场景分类下历史第七篇历史事件热气球
6 p" A" `) z) }$ ?4 k+ `it's inflated with helium unlike the original which was filled with hydrogen, and unbeknownst to the pilot.potentially explosive.什么意思？

场景分类下地球科学第九篇
* o8 v9 |. k& {8 P* ?: l$ WThat’s right. But the water in this ice (was way down below the Earth’s surface) when it was frozen, so it was under a lot of pressure. And trapped inside the crystals of ice are individual molecules of methane- that’s what’s in natural gas.
. [2 h) |) W2 |  B  q括号的部分不明白，麻烦大家了。