要向数据库添加记录，请选择 > 按钮并移动到最后一个记录（这应该是一个空白记录）。
To add a record to your database, choose the > button and move to the last record (which should be a blank record). Add an entry as shown below
没有一个国家要求霍乱疫苗接种证明作为入境条件，并且国际疫苗接种证书不再留出空白记录霍乱疫苗接种。
No country requires proof of cholera vaccination as a condition for entry, and the international certificate of vaccination no longer provides a space for recording cholera vaccination.
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。
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.
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