姚明在初步试训中觉得背部发紧和疼痛，琼斯认为这是长时间休息后回归的特有情况。

Yao has developed back tightness and soreness with his initial workouts, Jones said, though he added the back problem is typical when returning after a long layoff.

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以1998年江苏省甘薯品种区试材料为例，初步探讨了DTOPSIS法综合评价农作物品种稳定性的方法和步骤。

The paper primary explored the method of summarizing and valuing crop varieties′ stability using DTOPSIS with sweet potato regional test in Jiangsu province in 1998 as example.

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经湖试和海试，系统的可行性得到了初步的验证。

Its practicability has been proved by experiments on lakes and seas.

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