Language Point 41
... a great number of combinations, but he arrived at no result. (Para. 5)
a great number of: many
There are a great number of people there.
那里有很多人。
combination: n. something that results from two or more things, (esp. chemicals) being combined.
This project is a good combination of science and art.
這個項目是科學與藝術的完美結合。
arrive at: reach, make or decide on (an idea, decision, judgment or result)
It took them a long time to arrive at a very difficult decision.
他們花了很長時間才作出了一個艱難的決定。