【英语时差8,16】湿沙为什么黏在一起？（上）

Your five-year-old knows it: When it comes to building sand castles at the beach, wet sand is much better than dry. If you fill your bucket with dry sand and turn it over, you’re likely to end up with a tumbled ruin, not a proud tower or turret¹. Any junior civil engineer will tell you to use damp sand from the water’s edge to construct proper parapets. We'll learn why wet sand sticks on today's Moment Of Science. Fortunately for beach-goers everywhere, a group of physicists² at Notre Dame³ tackled this sticky problem. They discovered that wet sand sticks together for exactly the same reason water beads⁴ up on wax paper: a phenomenon called surface tension.

1 turret   

n.塔楼，角塔

参考例句：

• This ancient turret has attracted many visitors.这座古老的塔楼吸引了很多游客。
• The soldier scaled the wall of the fortress by turret.士兵通过塔楼攀登上了要塞的城墙。

2 physicists   

物理学家( physicist的名词复数 )

参考例句：

• For many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说，这是受挫折的一年。 来自英汉非文学 - 科技
• Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。

3 dame   

n.女士

参考例句：

• The dame tell of her experience as a wife and mother.这位年长妇女讲了她作妻子和母亲的经验。
• If you stick around,you'll have to marry that dame.如果再逗留多一会，你就要跟那个夫人结婚。

4 beads   

n.（空心）小珠子( bead的名词复数 )；水珠；珠子项链

参考例句：

• a necklace of wooden beads 一条木珠项链
• Beads of perspiration stood out on his forehead. 他的前额上挂着汗珠。