1.a member of 成员之一
Do you volunteer or serve in an organization or are you a member of some group?
你是否在某个组织服务或者担任志愿者，又或者你是某个团队的成员？

2.blend in 混入；混合
Seahorses are master mimics that use their cryptic colors and upright posture to blend in with plants.
海马是模仿大师，能利用自己的模拟色和直立姿态融入四周的植物中去。