But as global warming snakes its way into higher altitudes, a less-welcome resident in taking up space in this fragile ecosystem: the mountain pine beetle.
但是随着全球变暖向高海拔地区蔓延,一个不受欢迎的居民进入了这个脆弱的生态环境:山地松树甲虫。
How it got here: Scottish chemist and physicist Sir James Dewar invented the vacuum flask Iin 1892 as a way to keep liquid nitrogen from warming up and turning into gas in his lab.
它是如何问世的:1982年苏格兰化学家和物理学家James Dewar爵士发明了保温瓶用以防止实验室中的液氮升温而气化。
Most people are concerned about emissions and global warming, but even if you are not, you've surely realized that reducing energy use is an excellent way to free up money for better USES.
大多数人关心的是气体排放和全球变暖的问题,但即使你两者都不关心,至少你会意识到减少能源的使用会是一个绝佳的省钱方式,而钱省下来可以用来做别的更有用的事。
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