If you do not specify a location when creating the bucket, the bucket and its contents will be stored in the location closest to the billing address for your account.
如果在创建bucket时没有指定位置，那么bucket及其内容会存储在最接近您帐户的账单地址的地方。
Log files must be written to a bucket in the same geographical location (that is, us apps must write to us logs).
日志文件必须写到同一个地理位置的bucket中(即us应用程序必须写到US日志中)。
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