Among its most unusual items was Lenin’s brain, preserved in a formaldehyde solution in a glass jar.

而这其中最不寻常的东西就要算是放在玻璃缸中用福尔马林溶液浸泡着的列宁大脑呢。

The molecules do not have crosslinks, but they can be crosslinked by soaking them in formaldehyde solution.

这些分子没有交叉链，但是它们可以在甲醛溶液中可以形成交叉链。