Such changes are all but invisible over the short time scale of modern observations, and, it is argued, they are usually obscured by innumerable gaps in the imperfect fossil record.
这些变化在现代观测短时间范围内几乎是看不见的，而且，有人认为，这些变化常常被不完善的化石记录中的无数空白所掩盖。
This is to use the asthma inhalers carried around routinely by patients to record the time and location of symptoms as they happen.
这个解决方案就是利用患者例行性随身携带的哮喘吸入器来记录他们的哮喘症状出现时的时间和位置。
Emissions are rising by record amounts, and time is running out to avoid catastrophic warming.
排放正在超过历史记录，随着时间的推移，灾难性的变暖难以避免了。
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