She was rather imprecise about the cost of the trip.
她对清楚。
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The 30% to 99% range that the researchers posit for the amount of Martian water stored in the ground is admittedly imprecise—and will likely narrow definitively only when humans can collect fresh samples and study them up close.
诚然,研究人员假设的 30% 到 99% 的火星下水储量范围是不精确的——只有当人类能够收集新鲜样本并对其进行近距离研究时, 这一范围才可能最终缩小。