Again, the answer to this question varies from company to company. And again, testing is the way to find out what works best. Typically, weekends and mornings seem to be times when multiple emails are opened, but since your audience may have different habits, it's best to experiment and then use your data to decide.
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這座研究站是英國南極考察局（British Antarctic Survey, BAS）在這片冰封大陸運營的五個設施之一。該局是英國的極地研究機構。