The last time deaths outnumbered births in China was in 1961.中间应该是省略了when；学习使用outnumber作为vt的用法。
Income outnumbers expenditure.
catapult vt相当于propel，大力推动
Cost-competitive workforce has catapulted China’s economic growth.
make up有占…的意思
Elderly people currently make up a fifth of the population in China
注意其和make up for的区别，后者的意思是弥补
break sth down有解释说明的意思
let’s break down the decline of population and look at some of the reasons why.
demographic challenges人口方面的挑战
policy可以作不可数名词
These strategies will be part of future policy.
raise a child=bring up a child
omelette煎蛋
you can’t make an omelette without breaking eggs.有得必有失
highly pathogenic 高度致病的 pathology病理学
This virus is highly pathogenic.
Poultry家禽，不可数
avian flu（influenza）禽流感
上周价格提升了百分之七十之高
last week the price jumped as high as 70 percent.
Coral作不可数名词时表示珊瑚，作为可数名词——corals时表示珊瑚虫，有的珊瑚虫在满月后产卵
Some corals spawn following a full moon.
Pulchritudinous=beautiful
larva幼虫的单数，复数为larvae 注意和lava的区别lava不可数，没有r音coral larvae珊瑚幼虫
boost rates of recovery 快速提高恢复速度
boost rates of recovery of rainforests
sediment沉淀物，可不加s作不可数名词
This gadget can prevent sediment from settling on those corals.
Trial作vt是尝试的意思
Trial different designs and methods.
topography=layout 地形，不可数
This architecture blends into its surrounding topography.
sky可以作可数名词，变成skies.
This mirror reflects skies.
chameleon变色龙注意拼写
购买可以说成make the purchase
High prices didn’t stop me from making the purchase.
