1.leave behind 留下

Burning the forest just once can leave behind enough black carbon to keep the soil fertile for thousands of years.

森林仅仅燃烧一次就能留下足够的黑碳，来保持数千年土壤肥沃GR4wk-ob)li!lJjM%sXU。

2.align 使成一行

The top and bottom line of each column on the page should align.

版面每栏的头一行和末一行要对齐UhBqh;@NMW0j~GEU%。

3.result in 导致

Food allergies can result in an enormous variety of different symptoms.

食物过敏会导致大量不同种类的症状J7(rsyK-i+S_Kta2T。

4.prototype 原型

Inside a hanger at a Swiss airfield is the prototype of an aircraft that does not use any fuel at all.

在瑞士一个机场的飞机库里面有一架完全不用燃料的飞机原型.B=Me6&-LrPw,。