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....
Soft application for colour changing wall - washer units , with special protective louvres system not to affect inhabitants.采用可变换色彩的洗墙灯具, 加以不扰民的特殊保护的百叶窗系统.Theand exhaust the floor of cleaning room should consider use of ...