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±¼ÅÜÓã: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú, лл 2015-08-23 09:05:35
then, just as T2 in the figure, it remains still and lasts for 2.5 s.
half a circle.
2Â¥2015-08-22 11:15:33
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±¼ÅÜÓã: ½ð±Ò+4, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ллÀ²£¬ÄãµÄ·­Òë¸üºÃÒ»µã¾õµÃ 2015-08-23 09:05:18
it ......before keeping stationary for 2.5s, which is shown as the t2 in the Figure
keep stationaryÒ²¿ÉÒÔÊÇkeep still£¬ remain still£¬ remain stationary

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