Translate the following sentences into Chinese.(请手写答题,拍传然后提交作业) 1. More simply, logistics is the science and art of ensuring that the right products reach the right place in the right quantity at the right time to satisfy customer demand. 2. Customers not only want products physically available in the marketplace, they also want them in the right unit, sizes, in good condition and at the appropriate time. 3. Stock levels are of particular concern as they have a direct bearing on the customer service that can be offered and, at the same time, are the prime determinants of inventory holding costs. 4. One obvious point, though, is that expenditure on logistics varies widely between different industries. 5. Once considered an important, behind-the-scenes operational activity, logistics is now recognized as a strategic tool for creating customer value and loyalty。