observance

遵守

【例】We must insist on the observance of our terms and conditions.

我们一定要按（合约）条款办事。

observe

【1】遵守，执行

【例】We hope that you will strictly observe the terms and conditions of the S/C.

希望你方严格遵守销售确认书的条款。

【2】观察，注意到

①【例】We will send a representative to observe and study the US footwear market.

我们将派遣代表观察与研究美国鞋类市场。

②可接用从句。

【例】You will observe that owing to the non-arrival of your L/C before the time limit, it is impossible for us to effect shipment as required.

你方会注意到，由于你方信用证未能在限期前到达，我方不能按期交货。

obstacle

障碍

【例】Trade barriers are obstacles that restrict trade among nations.

贸易壁垒是限制各国之间贸易的障碍。