他們的演講總是能讓台下的觀眾充滿興趣，過程中的跌宕起伏也充滿張力，而這

他們的演講總是能讓台下的觀眾充滿興趣，過程中的跌宕起伏也充滿張力，而這就是這個技巧所帶來的效益

結果 (英文) 1:

Their speeches always make the audience full of interest, and the ups and downs in the process are also full of tension. This is the benefit brought by this technique.

結果 (英文) 2:

Their speeches always keep the audience interested, and the ups and downs during the process are also full of tension, which is the benefit of this technique

結果 (英文) 3:

Their speeches always fill the audience with interest, and the ups and downs in the process are also full of tension, which is the benefit brought by this skill.