for不需要去掉。However可能有点问题，可以试试Anyway。另外vocation拼错了，应该是vacation
Whatever the case, please send us the 8D before 17:30 today, because we'll have a new year vacation next week.
for去掉（不能和however同时存在），另外建议把have a vacation改为take a vacation会更好！
把for去掉
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