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1、necessary
必要的;必需的
I kept the engine running because it might be necessary to leave fast.
我没让发动机熄火，因为也许需要迅速离开。
We will do whatever is necessary to stop them.
我们要采取一切必要措施去阻止他们。
(结果或联系)必然的，势必的
Wastage was no doubt a necessary consequence of war.
巨大的损耗无疑是战争的必然结果。
Scientific work is differentiated from art by its necessary connection with the idea of progress.
科学工作与艺术的区别在于它与人类进步有着必然联系。
如果必要的话
If necessary, the airship can stay up there for days to keep out of danger.
必要时，飞艇能在那里停留数天以躲避危险。
The army needs men who are willing to fight, when necessary.
军队需要在必要时愿意投入战斗的军人。
2、executive
主管;管理者;经理
an advertising executive.
广告主管
Her husband is a senior bank executive.
她丈夫是银行高级主管。
管理的;执行的
A successful job search needs to be as well organised as any other executive task.
成功的求职与执行其他任何任务一样，都需要良好的条理性。
I don't envisage I will take an executive role, but rather become a consultant on merchandise and marketing.
我不设想自己将成为管理人员，但很希望成为商品营销顾问。
