今天是“坚持英语”坚持推送的第1861天

已推送过的原版书

(外国少儿读物)

虽然按照地区分类来看,北京是“坚持英语”读者分布最多的城市,但是北京之外所有地区人数之和远远大于北京读者的数量。不知道大家所在的地方这几天天气如何?

北京这几天真是冷炸了天!一点不夸张。身在北京的小伙伴可以作证。

在这样冷的天气里,不用爸妈催促,我们自己也会把——甚至是绒裤、棉裤——找出来套上。

秋裤之所以不用腰带也能老老实实套在腰上,就是因为里面有松紧带 elastic。

图片来源 丨wikihow.com

没错,elastic 除了作为形容词意思是有弹性的、有弹力的,还可以做名词,意思就是橡皮圈、松紧带。

阅读今天的推送,看 elastic 出现的一个语境,顺便了解一点粗浅的科学知识吧。

THE POWER OF STRETCH

Pull back on a catapult and the force you use stretches the elastic. This stores energy inside it, known as potential energy. When you let go, the elastic returns to its original shape. The stored energy must go somewhere — so it is given to the stone, flinging it through the air.

▸ catapult 弹弓;石弩

▸ elastic 松紧带,橡皮带

▸ potential energy 势能

▸ fling 扔,抛,丢

STRETCHY SKIN

Pinch your skin and let go and it springs straight back again. This is because young skin is very elastic. Older skin is not so elastic, which is why older people have more wrinkles. Anti-wrinkle creams work by covering skin in gluey chemicals that stretch it tight. This makes wrinkles disappear — at least for a time.

▸ pinch 拧,掐

▸ spring 跳跃,蹦跳

▸ anti-wrinkle cream 抗皱霜

▸ gluey 胶黏的,涂满胶的

Rubber can be stretched to three times its length. Hydrogels, the world’s stretchiest materials, can be pulled to 20 times their original length.

▸ hydrogel 水凝胶

MAKING RUBBER STRONGER

Rubber comes from trees, and it is white, gooey, and smelly. This pure kind of rubber, called latex, is used to make stretchy things like balloons, but it is not very strong. We can make rubber more useful by cooking it with sulphur. This makes the rubber hard, black, and tough. It is not as stretchy, but it is stronger and lasts longer.

▸ gooey 软而黏的,黏糊糊的

▸ latex 乳胶,橡胶

▸ sulphur 硫磺

The molecules inside the rubber pull far apart and spring back to shape.

Sulphur bridges between molecules make the rubber harder to stretch, but tougher.

▸ sulphur bridge 双硫键

以上英文内容摘自儿童读物 Science, a children's encyclopedia。本书装帧讲究、排版舒服、框架清晰、配图精美,语言简练,内容充实。若喜欢本书内容,请购买原版书。返回主界面回复“科学”查看已推送过的本书内容。

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