since 3 duration
自3持续时间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Since 3 duration, the day after every molted silkworm, once a day or once every other one day.
从三龄起，每龄起蚕后第二天，每日一次，或隔日一次。
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The island also had its lowest recording of sunshine duration since 2003 with 137.3 hours.
BBC: Weather station data shed light on wet July
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