他们群集在老师的周围.They trooped around the teacher.囚犯群集在围墙里.The prisoners horded together in the compound.特定的群集度是多数植物特有的特征.A certain sociability degree is a specific character of most plants....
Get your body moving to boost energy, stay supple and shake off winter lethargy.锻炼身体以增加活力，保持柔韧性，甩掉冬日的慵懒。He felt that he had to drag himself out of his lethargy and begin to write.他觉得自己必须打起精神，开始写作。Symptoms include tiredne...