cryptic bird造句

例句与造句

1. Counting such cryptic birds is not easy; over the decade from 1998 to 2007 the average total recorded in the biannual count program was 287 birds ( with numbers fluctuating between about 100 and 450 ), while assessments during the 1970s  2000s have estimated the total population at 750 birds.
2. It's difficult to find cryptic bird in a sentence. 用cryptic bird造句挺难的