presence是什么意思啊英语，pre-essence是什么意思

presence-only data是什么意思

presence-only data
存在唯一的数据
A species distribution model, Maxent, modeled the spatial distribution of 39 rare and endangered species living in the Minshan region using the presence-only data and the environmental variables including biotic factors, terrain factors and human disturbance factors. After that, the priority areas of study species were identified, and the optimization solution of reserve selection in the Minshan region was further raised.
本研究以物种出现点数据和包括生物、地形和人类活动干扰因子在内的环境变量为主要数据源，在物种分布模型MAXENT的支持下，模拟39种珍稀濒危物种的空间分布，在此基础上，通过ZONATION模拟，鉴别出岷山地区珍稀濒危物种保护优先区，并提出了自然保护区空间选址的优化方案。

be in one's presence是什么意思

be in one’s presence
在你的存在

military presence是什么意思

military presence
军事存在
例：Norway responded that russia was expanding its military presence in the region.
挪威回应称俄正在扩大其在该地区的军事存在。

presence+of+mind是什么意思

presence of mind
[英][ˈprezəns ɔv maind][美][ˈprɛzəns ʌv maɪnd]
n.
镇定，沉着;

1
When the fire started in the kitchen, John had the presence of mind to turn off the gas.
厨房起火时，约翰镇定地关掉了煤气。