雷达空间标校目标时，采用固定觇牌作为观测标志。
Fixed target is adopted as observation mark in marking targets of surveying radar.
精度分析和实际应用表明；观测成果是可靠的，采用几种精密测量方法联合进行，可以满足观测标志的高精度要求。
The precision analysis and practical application indicate that all the results are reliable and united several precision surveying methods can satisfy high accuracy.
吸大号雪茄对美国人来说是一个事情进展顺利的标志，香烟消费趋势的变迁是观测国民情绪精确的风向标。
THE smoking of a fat cigar is a sign that things are going well for Americans and shifts in cigar consumption are an accurate barometer of the national mood.
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