Is it some global temperaturechange or weather pattern like El Ni?o?
它是种全球性气温变化，还是厄尔尼诺那样的天气现象？
2
These act like batteries when they undergo a temperaturechange: attach electrodes to them and they generate a current.
它们经历温度变化时会像电池一样工作：给它们接上电极，它们就会产生电流。
3
Only during the short lag between onset of global temperaturechange and sea level response can warm-adapted species migrate from the equator toward higher latitudes.