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- Annual ring (growth ring) The annual increase in girth of the stems or roots of woody plants, as a result of cambial activity. 年轮：木本植物形成层的活动随着季节的更替而表现出有节奏的变化。
- Pattern in Cambial Activity in Eucommia ulmoides 杜仲形成层的活动式样
- Periodicity of Cambial Activity and Variability of Peroxidase and Esterase Isozymes in Eucommia ulmoides Oliv 杜仲形成层活动周期及过氧化物酶和酯酶同工酶的变化
- Periodicity of Vascular Cambial Activity and Dynamic Changes of Cell Ultrastructure in Populus deltoides 美洲黑杨维管形成层活动周期性及细胞超微结构的动态变化
- The office has been humming with activity. 办公室一直忙着搞活动。
- The threat of war has depressed business activity. 战争的威胁使经济萧条。
- There has been a lot of activity in the town today. 今天市中心相当热闹。
- The town was humming with activity. 该市镇生气勃勃，呈现一片热闹的景象。
- Stamp collecting is my favorite activity. 集邮是我最喜爱的消遣。
- The store was a scene of great activity. 这家商店顾客盈门。
- He once engaged in anti-government activity. 他一度从事反政府的活动。
- The office is humming with activity. 办公室里一片忙碌。
- A tissue produced inwardly by the cork cambium. 栓内层在内部由软木新生层产生的组织
- A tissue produced inwardlyby the cork cambium. 栓内层在内部由软木新生层产生的组织。
- A center of interest or activity. 中心兴趣或活动的中心
- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
- An increase, as in movement or business activity. 进步，改进，改善运动或商业活动的进步或兴隆
- Indulgence in or pursuit of sexual activity. 纵欲; 追求肉欲对性行为的放纵或追求
- The phenomena associated with volcanic activity. 火山现象与火山活动有关的现象
- A range of endeavor or activity; a province. 范围努力做 ... 的范围或活动范围; 范围
