一部分候鸟在传播该种病毒方面的作用现在仍处于研究阶段。
The part of migratory birds play in spreading the virus is still being studied.
深度运动知觉问题的研究目前仍处于探求阶段。
我国高等级公路边坡防护的研究起步较晚，至今仍处于不断完善和改进当中。
Our study of highway slope protection start late and still is constantly refining and improving.
目前，针对站场管道数据模型的研究仍处于起步阶段。
At present, it is still a virgin field in studying station pipeline data model.
目前，针对站场管道数据模型的研究仍处于起步阶段。
At present, it is still a virgin field in studying station pipeline data model.
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