例句與造句

1. In the 1980s, Australian researchers developed a laparoscopic insemination procedure which, combined with the use of progestogen and pregnant mare's PMSG ), yielded much higher success rates ( 50-80 % or more ), and has become the standard for artificial insemination of sheep in the 21st century.
2. It's difficult to find artificial insemination of sheep in a sentence. 用artificial insemination of sheep造句挺難的