In all of these situations, the escalation of fatalities estimated by the researchers' mathematics closely matched the course of actual deaths, the team reports online today in Science.
研究团队在今天的《科学》在线发布结果,在所有的情境中,研究人员用数学运算估计的逐步上升的死亡率都与实际的死亡率变化相吻合。
Of course, balloons do not last as long as conventional power stations (each is estimated to have a working life of about a year). But the fuel (sunlight) is free.
当然,太阳能气球的寿命不会和传统发电厂一样,一颗太阳能气球的寿命大约一年,但是燃料(太阳能)却完全免费。
Of course, no project ever proceeds entirely as it was estimated and planned.
当然,没有一个项目会完全依照估计和计划那样进行的。
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