For the best crab viewing, Australian officials advise tourists (pictured, a Christmas Island visitor in an undated photo) to arrive during the lastquarter of the moon in either November or December.
每年十一月或十二月的下弦月是最佳的观蟹时机，澳大利亚官方建议游客们选择这个时间前来圣诞岛观光。
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In the morning and late afternoon around the lastquarter of the moon, the egg-laden females descend from the terraces to the shoreline.
早晨和午后，通常是下弦月时，雌性从岩石边下来，来到海岸线。
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Now that the moon is past lastquarter and therefore gone from the evening sky, look for one of summer's most beautiful celestial sights.