英语语法分析
queuing
v. <英>排队（等候）；竞相，抢着（做某事）（queue 的现在分词）
例句
More importantly, scientists are already queuing for seats on these low-gravity space-flight services so they can collect data during a few minutes of weightlessness.
更重要的是，科学家们已经在排队争取这些低重力太空飞行服务的座位了，这样他们就可以在几分钟的失重状态下收集数据。