Most suits had emergency wire loops that let you lasso yourself to some fixedspot, and a few of the intruders had managed this.
绝大多数宇航服上都有能够将人固定到突起物上的紧急缆绳，那几个入侵者做到了这一点。
2
The oceanic volcanic islands and their hot-spot trails are thus especially useful for geologists because they record the past locations of the plate over a fixed source.
海洋火山岛和它们的热点轨迹对于地质学家尤其有用，因为它们记录了过去的板块在固定地点之上的位置。
3
Sometimes the cannon is fixed in position, and other times you have to use the force of firing it to push it into a spot where you can hit the ball.