毫无疑问，这幅漫画意在向人们敲响警钟，即人类永不知足的生产和使用汽车给我们的地球带来了巨大的负担。
The cartoon, no doubt, aims at alarming humans of the heavy load we have exerted on Earth by our insatiable production and usage of automobiles.
在当前因环境压力因素，马尔萨斯人口论向人们敲响警钟时，生育率的降低也不失为人们对全球人口走向担忧的一剂安抚剂。
At a time when Malthusian alarms are ringing because of environmental pressures, falling fertility may even provide a measure of reassurance about global population trends.
今天的肥胖将会导致未来更多的痴呆，这不得不为人们敲响了警钟。
The possibility that obesity today will lead to higher rates of dementia in the future is, therefore, deeply alarming.
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