Level 211
Level 213
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recently
近来
perseverance
毅力
marginal notes
注释
industry
产业
to contact
联络
cement
水泥
dry and dull
枯燥
early in the morning
凌晨
crystallization
结晶
successive years
连年
tough and durable
坚韧
to organize
主办
consort
配偶
to burst out
迸发
to take precautions
戒备