puzzle是什么意思？

Their functioning is still a puzzle to be solved.

The tests are designed to detect subtle ( ' , 细微的) changes in mental function, and involve solving puzzles, recalling words and details from stories, and identifying patterns in collections of letters and symbols.

The study, which followed more than 2,000 healthy adults between the ages of 18 and 60, found that certain mental functions—including measures of abstract reasoning, mental speed and puzzle-solving—started to dull as early as age 27.

According to Orzack, people who struggle with heavy reliance on the Internet may feel puzzled.

His doctors were puzzled by the strange case of permanent sleeplessness.

The puzzle was what benefit would be gained from it when performance might be affected the following day.

"For all the anxiety the essay causes," says Bill McClintick of Mercersburg Academy in Pennsylvania, "it's a very small piece of the puzzle.

Whether immigrants are good or bad for the economy has been puzzling economists.

The paintings may yield even more stunning surprises as additional sections are put together like pieces of a puzzle.