18.i want to take a minute to thank the keynote speakers, mr. smith and mr. williams.我想用短短的時間向基本方針演講者史密斯先生與威廉斯先生表示感謝之意。
19.it hardly seems that the five days given to this conference have passed already.似乎很難相信開這個會五天就這樣過去了。
20.prof. smith will make a short address to all of us giving his thanks and his impressions of the convention.史密斯教授向我們大家簡短說幾句話，表示他的謝意以及對會議的感想。