阳光杀菌法的装置非常简单，用了钥匙扣的一部分，放在阳光下时它就会闪烁。
The SODIS device is very simple, and USES parts from a keychain that blinks when exposed to light.
碳定年法显示这种植物至少从小冰河时期(大约400年前)开始就从未接触过阳光。
Carbon dating showed that the vegetation had not seen the sun since at least near the start of the Little Ice Age, some 400 years ago.
无论是单项座位探测法或多项座位探测法，如果样物存放时间太久或因阳光或天气而退化——它的功效很快就降低。
The power of both single and multi-locus probes diminishes rapidly if the sample is old or degraded by sunlight and weather.
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