例句與造句

1. Hohmann soon began to fill up most of his free time with the study of astronomy, and started seriously considering the problem of interplanetary spaceflight.
2. "' Interplanetary spaceflight "'or "'interplanetary travel "'is travel between planets, usually within a single planetary system.
3. Plans for future crewed interplanetary spaceflight missions often include final vehicle assembly in Earth orbit, such as NASA's Project Orion and Russia's Kliper / Parom tandem.
4. Interstellar travel will be much more difficult than interplanetary spaceflight; the distances between the planets in the Solar System are less than 30 astronomical units ( AU )  whereas the distances between stars are typically hundreds of thousands of AU, and usually expressed in light-years.
5. "' Shin'en "', known before launch as "'UNITEC-1 "'or "'UNISEC Technology Experiment Carrier 1 "', is a Japanese student spacecraft which was intended to make a flyby of Venus in order to study the effects of interplanetary spaceflight on spacecraft computers.
6. It's difficult to find interplanetary spaceflight in a sentence. 用interplanetary spaceflight造句挺難的