过栏技术还存在缺陷。
用运动学观点，从起跨上栏、腾空过栏和下栏支撑三个方面进行分析。
From the perspective of kinesiology, three aspects are analyzed concerning fence - ascending, fence - over striding and fence - descending.
三个星期前我们曾报道过Firefox计划把Ubiquity系统植入地址栏。
Three weeks ago we wrote about Firefox's plans to build the command-line-type Ubiquity system into the address bar.
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