The draft has been handed to the bank on clean collection.

汇票曾经交银止按光票托收。

Thee draft has been handed to the bank on clean collection.

汇票已经交银行按光票托收。

It may be categorized into import collection and export collection, where the latter can be further divided into export documentary collection and export clean collection.

根据方向不同分为进口代收业务与出口托收业务，出口托收又分为出口跟单托收与出口光票托收。

In my case, I'd like the database to have a clean set of data before each logical test collection is run.

在本文的示例中，在运行每个逻辑测试集合前，我希望数据库具有一组干净的数据。

The downside is that it's log structured, and garbage collection is needed to clean up old data and metadata.

而缺点在于，它是日志结构的，所以需要垃圾收集，以便清理旧的数据和元数据。