Drug 英 /drʌg/ 美 /drʌg/
释 义 n. 药；毒品；麻醉药；滞销货；vt. 使服麻醉药；使服毒品；掺麻醉药于；vi. 吸毒
例 句 Right now, we have no idea of the impact of these drug residues or what we can do about them. 目前，我们还不知道这些药物残留会对身体产生什么影响，也不知道该对它们做些什么。
Delivery 英 /dɪ'lɪv(ə)rɪ/ 美 /dɪ'lɪvəri/
释 义 n. [贸易] 交付；分娩；递送；复数 deliveries
同根词 deliverable adj. 可以传送的；可交付使用的；deliver n. 投球；deliverer n.拯救者；交付者；投递者；deliver vi. 实现；传送；履行；投递；deliver vt. 交付；发表；递送；释放；给予（打击）；给…接生
例 句 They have no experience with the global delivery model. We are masters at it.
Systems 美 /'sɪstəm/
释 义 n. 系统；体制，体系；制度（system 的复数）
例 句 We have similar systems in the UK but not as good. 英国也有类似的体系，但没有那么好。
作者： Ganji Seeta Rama Raju
期刊：Semin. Cancer Biol.
Cancer is an outrageous disease with uncontrolled differentiation, growth, and migration to the other parts of the body. It is the second-most common cause of death both in the U.S. and worldwide. Current conventional therapies, though much improved and with better prognosis, have several limitations. Chemotherapeutic agents, for instance, are cytotoxic to both tumor and healthy cells, and the non-specific distribution of drugs at tumor sites limits the dose administered. Nanotechnology, which evolved from the coalescence and union of varied scientific disciplines, is a novel science that has been the focus of much research. This technology is generating more effective cancer therapies to overcome biomedical and biophysical barriers against standard interventions in the body; its unique magnetic, electrical, and structural properties make it a promising tool. This article reviews endogenous- and exogenous-based stimulus-responsive drug delivery systems designed to overcome the limitations of conventional therapies. The article also summarizes the study of nanomaterials, including polymeric, gold, silver, magnetic, and quantum dot nanoparticles. Though an array of drug delivery systems has so far been proposed, there remain many challenges and concerns that should be addressed in order to fill the gaps in the field.