本文验算了J-7飞机的稳定边界和前操纵边界，简单分析了其重心使用范围。

This paper checked stability boundary and front control boundary for J-7 aircraft, analysed simply it's operating range of the c. g. position, estimated and discussed the c.

youdao

三年前，一个研究小组断言犬类也会这么做，他们进行了类似的实验，不过是让一条狗观察另一条狗用它的爪子或者嘴巴去操纵一个把手。

Three years ago a group of researchers asserted that dogs could do the same, using a similar experiment, but with a dog watching another dog using its PAWS or mouth to manipulate a handle.

youdao

这仍然是一个百慕大帆，但主帆成比例地变大了，而前帆则相应变小，以便于操纵并获得最大动力。

This is still a Bermuda rig, but the mainsail is proportionally larger and the jib smaller, for ease of handling and maximum power.

youdao