TEAMS　　Each soccer team has eleven players and three substitute， or reserve players. The team consists of a goalkeeper， ......

Old towns like Lijiang have enormous historic, artistic, and architectural value. The buildings in such old towns are us......

Did you know that an eagle knows when a storm is coming long before it breaks out？　　你知道吗？鹰在暴风雨爆发之前就知道暴......

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Dielectric elastomer (DE) is the most promising electroactive polymer material for smart actuators. When a piece of DE f......