Adding to the threat, the company, in buying iron for Titanic\'s rivets, ordered No. 3 bar, known as "best," not No. 4, known as "best-best," the scientists found. They also discovered that shipbuilders of the day typically used No. 4 iron for anchors, chains and rivets.
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Depleting the number of lobsters, for example, means that we are adding to the threat of coral decline.
例如,减少龙虾的数量意味着也增加了珊瑚群数量锐减的风险。
Getting people to care about a climate threat that is decades away is hard enough, they say, without adding in the vagaries of natural climate cycles.
他们说,让人们关心数十年以后的气候威胁实在是太困难了,更何况自然气候循环本身也是变幻难测。
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