以下是一篇药学英语课文及翻译：
Article Title: Drug Delivery Systems
文章药物输送系统
Drug delivery systems are devices or methods that are used to introduce medication into the body. These systems can be used to target specific areas of the body, release medication gradually over time, or protect the medication from being degraded by stomach acid or other bodily fluids.
药物输送系统是引入药物到人体的设备或方法。这些系统可以用于定位身体的特定区域，逐渐释放药物，或保护药物不被胃酸或其他体液分解。
Some examples of drug delivery systems include transdermal patches, which deliver medication through the skin, and inhalers, which deliver medication through the lungs. Other examples include drugeluting stents, which are used to treat heart disease, and implantable drug pumps, which deliver medication directly to the spinal fluid.
一些药物输送系统的例子包括经皮贴片，通过皮肤递送药物，以及吸入器，通过肺部递送药物。其他例子包括药物洗脱的支架，用于治疗心脏病，以及可植入的药物泵，直接将药物输送到脊髓液中。
Drug delivery systems have several advantages over traditional methods of medication delivery. They can improve patient compliance by eliminating the need for frequent dosing or injections, and can also increase the bioavailability of the medication by targeting specific areas of the body. They may also reduce the potential for adverse effects by minimizing exposure of nontargeted tissues to the medication.
药物输送系统比传统的药物输送方法有许多优点。它们可以通过消除频繁的服药或注射来提高患者的依从性，并且可以通过针对身体的特定区域来增加药物生物利用度。它们还可以通过最小化非靶向组织的暴露于药物而减少不良反应的可能性。
Despite their advantages, drug delivery systems also have some limitations. For example, some systems may be expensive or difficult to produce, and some may require specialized training for use. Additionally, some systems may not be suitable for all patients, such as those with certain medical conditions or allergies.
尽管具有优点，药物输送系统也存在一些限制。例如，一些系统可能昂贵或难以生产，一些可能需要专门的培训才能使用。一些系统可能不适用于所有患者，如那些患有某些医疗条件或过敏反应的患者。
Overall, drug delivery systems have become an increasingly important part of modern medicine. As technology continues to develop, new and more advanced drug delivery systems are likely to be developed, with the goal of improving patient outcomes and reducing the burden of disease.
总体而言，药物输送系统已成为现代医学中日益重要的一部分。随着技术的不断发展，新的更先进的药物输送系统有望开发出来，旨在提高患者的预后，减轻疾病的负担。
