booster stage

基本解釋

The first-stage booster will parachute into the Atlantic Ocean where it will be recovered for inspection by engineers.
第一級助推器將借助降落傘掉入大西洋，然后由工程師對其回收并作檢查。
The bombs were, first, the upper-stage booster of a probe called LCROSS (Lunar Crater Observation and SensingSatellite) and then, five minutes later, the LCROSS probe itself.
撞擊先由LCROSS（月球隕石坑觀察感應衛(wèi)星）探測器的一級助推器完成，五分鐘后LCROSS自身進行第二次撞擊。
Tokyo said the first booster stage appeared to fall into the Sea of Japan, and the second into the Pacific Ocean – a marked improvement on a test of the Taepodong-2 missile three years ago.
日本方面表示第一節(jié)推助器好像掉入了日本海，第二節(jié)墜入了太平洋。這和三年之前試射的大浦洞2號導彈相比有明顯改進。