AZUZ: The most powerful rocket in the world taking off. Falcon Heavy is the name of the SpaceX rocket. After a couple of delays, it blasted off the ground at about 3:45 p.m. yesterday at Kennedy Space Center in Florida. SpaceX, which has received billions in grants from NASA estimates that each launch of a Falcon Heavy rocket caused about $90 million. But that's reportedly hundreds of millions cheaper than the world second most powerful rocket.
As a way to decrease the high cost of spaceflight, Falcon Heavy's three rocket boosters are designed to land upright back on earth to be reused.
At least two of them did that yesterday at Kennedy Space Center. The third was supposed to land at a platform at sea but we didn't know immediately if that return was a success.
昨天，至少2个助推器已在肯尼迪航天中心着陆 。第3个助推器应该在一个海上平台着陆，不过我们目前还不知道那个助推器是否成功着陆 。
1. take off (飞机)起飞；
例句：As the aircraft was ready to take off, all the passengers fastened their seat belts.
2. a couple of 两个；几个；
例句：I'm still in the air force, though I'll be demobbed in a couple of months.
3. at least （数量）至少，不少于；
例句：In total, we plan to shutdown at least 800 data centers, some 40% of our inventory over the next four and a half years.
4. be supposed to do sth. (按计划或期望)应当，应该，须；
例句：I'm supposed to have handed in a first draft of my dissertation.