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- Parachutes are useful. 降落伞是有用的。
- Toads have an ugly appearance but they are useful. 蟾蜍外表丑陋,但很有用。
- A test run would be useful to the statisticians. 试运转将对统计学家有用。
- John always tries to cultivate people who are useful to him. 约翰经常设法和对他有用的人结交。
- The book is likely to be useful, only it's rather expensive. 这本书可能有用,只是相当贵。
- His years of study were useful in his job. 他多年的学习有助于他的工作。
- Bunk beds are useful for children. 双层床对孩子们很有用。
- Cocoons of silkworms' are useful. 蚕茧用途广泛。
- Dextrose solutions are useful for providing water. 葡萄糖液可用来供给水分。
- A final inflation model for parachutes was established. 建立了降落伞主充气模型。
- Crucial parameters of the ordinary and special parachutes are simulated, and the test results analyzes. 对人用伞和典型的专用伞也进行了仿真实验。
- The parachutist was buckled into his harness. 跳伞者扣上了背带。
- Don't do in the box, it may be useful. 不要把那箱子弄坏,它可能有用。
- Do not destroy that box -- it may be useful . 别把那个盒子毁掉,它也许有用。
- Toads have an uglyappearance but they are useful. 蟾蜍外表丑陋,但很有用。
- They select books that are useful to them. 他们挑选那些对他们有用的书。
- Some infrared machines are useful to us. 一些红外线机械对我们很用。
- Line numbers are useful for navigating code. 行号在代码定位时非常有用。
- Lasers might also be useful for diagnoses. 激光也还可以用于诊断。
- Videos are useful things to have in the classroom. 教室里有录像设备是很有助益的.