Importing African cheetahs to the western United States could, in theory, put the pronghorn back onto its natural evolutionary trajectory according to these biologists.
从理论上讲，把非洲猎豹引进美国西部，可以让叉角羚重新回到生物学家所说的自然进化轨道上。
2
The formation natural deflecting law and force are the basic geological foundation for the well trajectory control in directional wells and deflecting-protection in vertical wells.
地层自然造斜规律和造斜能力是定向井井眼轨迹控制和直井防斜打直的基本地质依据。
3
Gait designs were divided into two main categories: reference trajectory and natural dynamics.