The preparatory work for the conference had been undertaken at two meetings of experts.

在两次专家会谈中，人们已经着手了会议的筹备工作。

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At least a year's preparatory work will be necessary before building can start.

在建造开始之前至少需要一年的准备工作。

《柯林斯英汉双解大词典》

The two blocks have begun preparatory work, but a decision on formal talks is not due until 1999.

ECONOMIST: The free-trade winds die away

Much preparatory work has been done since the idea was accepted at a pan-American summit in Miami in 1994.

ECONOMIST: The free-trade winds die away

Regarding post-war planning, much preparatory work has been done, but much more remains.

CENTERFORSECURITYPOLICY: Post-War Planning