这减少了编写和维护模式的工作量，还确保了不会有某个复杂类型被偶然遗漏而不能扩展。
This reduces the effort to write and maintain the schema, as well as ensures that no complex type is accidentally left inextensible.
博客是表达某些观点的广阔媒介，但是它不能掩盖那些过于大而复杂的观点。
Blogging is a great medium for expressing certain ideas, but it's a weak medium for covering topics that are too big or too complex.
正则表达式支持有可能并且通常会无法识别或不能处理复杂查询，而正则 grep 却可以轻松处理。
Regular-expression support is minimal at best and can often be unrecognized or unprocessable for complex queries that regular grep can handle easily.
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