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上每年至少有40次中强度地震在一些地方造成损失。
At least 40 moderate earth quakes cause damage somewhere in the world each year.
youdao
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锡的添加改进了强度而基本没有延性损失。
The tin addition improves strength without substantial loss of ductility.
youdao
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锡的添加改进了强度而基本没有延性损失。
The tin addition improves strength without substantial loss of ductility.
youdao