贸易额的英文：
volume of trade (between countries)

The volume of trade has receded.
贸易额已减少。

How does the volume of trade for last year average out?
去年的贸易额平均是多少？

The volume of business with Japan has increased.
与日本的贸易额增加了。

In 1999, the foreign trade volume of SEZs accounted for nearly one fifth of the nation's total
1999年，经济特区的对外贸易额占全国总额的近五分之一。

Over the past few years, trade between the U.S. and China has increased dramatically over eleven-fold since 1979.
自1979年以来的过去几年间，美国与中国的贸易额迅速增长，已超过原先的11倍。

The volume of trade has receded.
贸易额已减少。

The purpose of this volume is to exhibit the cell.
本书的目的是阐明细胞。

What's the volume of this cylinder?
这个圆筒的体积有多少？

Jack of all trades is of no trade
万事皆通,一无所长

the trade in pornography
色情作品的交易.

Foreign trade departments handle export and import trade.
外贸部门经营进出口业务。

Between ourselves
秘密地说

Interaction between systems or between properties of a system.
系统间或一个系统的各种特性之间的相互作用。

You have your choice between the two.
在这两个之中，你有选择权。