| 1. | Dextrose solutions are useful for providing water .
葡萄糖液可用来供给水分。 |
| 2. | Antibiotic ointments are useful for concurrent bacterial infections .
抗菌素软膏对伴发的细菌感染是有用的。 |
| 3. | They do not preempt the land surface that is useful for other purposes .
它们不预先占用对其它目的有用的地面。 |
| 4. | Such a traditional division of the zone of aeration is useful for illustrative purposes .
为了说明的目的，包气带的传统划分是有用的。 |
| 5. | There are many kinds of dogs; some are used to tend sheep; some are useful for hunting .
狗的种类很多，有的用于保护羊群，有的用于打猎。 |
| 6. | Soil analysis is useful for detecting gross shortages of lime, phosphate and potassium under grazed grass .
对于放牧的牧场，应用土壤分析对石灰、磷和钾是否不足进行粗略的鉴定，是有用的。 |
| 7. | Similar experiments might be useful for future use in the science of dental materials and in prosthodontics for precision measurements of different character .
类似的实验在牙科材料学和镶牙术中将有可能用于一些不同性质的精密测量。 |
| 8. | The secretion of bile is useful for our bodies
胆汁的分泌对我们的身体很有用处。 |
| 9. | This is useful for building satellite assemblies
这对于生成附属程序集很有用。 |
| 10. | Trace switches can be useful for filtering information
跟踪开关可用于筛选信息。 |
