lest

And, lest we forget, Einstein wrote his most influential papers while working as a clerk.

而且，为了不使我们忘记，爱因斯坦在做小职员的时候写了他最有影响的论文。

For hundreds of millions of years, turtles have struggled out of the sea to lay their eggs on sandy beaches, long before there were volunteers to hand carry the hatchlings down to the water's edge lest they become disoriented by headlights.

数百亿年，海龟一直努力在大海沙滩上产卵，很久以前就有志愿者手携带幼仔到水边以免它们受车灯干扰，迷失方向。

I was afraid to open the door lest he should follow me.

我当时害怕打开那个门惟恐他跟踪我。