In taking the veterinarian's oath, she had pledged herself to a code of honor that bound her to the care of animals but also bound her to the saving of human lives through medicine.
请问句首的in在此处是什么意思?如果表示“在。。。期间”的话,后面句子是不是应该用一般过去时态而不是过去完成时态?
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