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Nanomedicine is one of the fastest growing areas and is considered to revolutionize healthcare and medicine [1].Triggered-release from nanosystems has attracted considerable attention for the ondemand release of compounds and is widely used in drug delivery,fragrance release,or self-healing materials [2].Among various existing triggered-release systems,pH-sensitive polymer drug delivery systems have been widely studied in cancer therapy due to the acidic environment (about pH 5.5-6.5) in tumor tissue [3].