第四部分，考察晚清海关提高效率、因地制宜等措施，揭示赫德的关税“便利原则”。

The forth part studies the measures of improving efficiency and adjusting measures to local conditions to reveal Hart's tariff"convenient principle".

youdao

就像在OO设计中，工厂给与我Liskov替换原则的便利，在消息传递设计中，仲裁为我带来了替换的便利。

Just like factories give me the benefits of the Liskov substitution Principle in OO design, intermediation gives me the benefits of substitution in messaging design.

youdao

这两大原则使得信用证机制能以最小的成本运行，但是也为信用证受益人的欺诈提供了便利。

These two principles make the L/C mechanism run at lowest cost, but they bring convenience to L/C beneficiary for fraud.

youdao