Through using the method of theoretical analysis, observation and interview, this paper made comprehensive discussion on basic technique and tactics of receive a service of tennis.

采用理论分析、行为解析、观察、访谈等方法，对网球运动中重要的环节——接发球的基本技术和战术进行了比较全面的探讨。

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Methods The forest ecosystem service is evaluated by the method of material valuation, the ARCVIEW geographic information system technique, and the observation on the spot in the different regions.

方法应用物质量和价值量相结合的方法，借助ARCVIEW地理信息系统技术，根据不同林分在不同区域的实地观测值进行估算。

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Capt. Frank Luke, famed World War I ace of the 27th Aero Squadron, wore a leather coat and helmet over his service dress uniform when he went hunting German observation balloons.

弗兰克·卢克，一战期间第27航空联队著名的王牌，在猎杀德国人的观察气球时的穿着是在军便装外加一件皮外套和飞行帽。

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Also, since WeGoLook typically does not take possession of the item or property (unless you order our shipping assistance service), the firm warns that it has no control over substitutions or changes that could possibly occur after the observation is made.

FORBES: Can't Look At An Online Purchase Before You Buy? WeGoLook can