To better achieve this purpose, we divide the implementing process into three stages: preliminary stage, mid stage and later stage, each with different orientations.

为了更好地在高校开展研究性学习，我们可将其实施分为三个阶段：初期阶段、中期阶段、后期阶段。在不同的阶段有不同的目标定位。

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A field experiment was conducted to study the nutrient balance and economic benefit on winter-wheat and rice system with mid-stage effluent of ammonium sulfite method irrigation.

通过田间实验，研究亚铵法制浆中段水经土地处理的同时作为灌溉用水的农田养分平衡状况及经济效益。

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Hopes were raised when the companies decided to start a late-stage trial of the drug, but data from mid-stage trials is not yet available, so it's difficult to know whether that bet will pay off.

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This follows murky mid-stage results from another type of amyloid blocking drug from Pfizer and Elan.

FORBES: Renegade Researcher Says Alzheimer's Drugs From Bristol-Myers, Pfizer May Be Unsafe Or Ineffective

As a mid-stage company, there will be a tendency to add in more specialists.

FORBES: When to Hire Generalists vs. Specialists: Lessons from the Fab Five