...觉得负疚. ... now and then 时不断地 give a talk 作讲演、报告 send out 散发、发送（信函、货物等） ...
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安装(Installed)作讲演(Lectured )谈判..
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短语
作讲演、报告
give a talk
作讲演、演讲
give a talk
作演讲
make a speech
;
give a talk
;
give a speech
作报告、演讲
give a talk
写作演讲技巧
Writing and Presentation Skills
商务报告的写作与演讲
Business Plan And Presentation
给某人作演讲
make/give a speech to sb
作连续的讲演
give a course of lectures