Yuan spent four years looking for a wild rice strain that could be crossed.

袁先生花了四年时间寻找一种可以杂交的野生水稻品种。

youdao

First a strain with high lysine content is crossed with one having good yield characteristic.

首先把一个赖氨酸含量高的品系与一个具有丰产特性的品系相杂交。

youdao

When mice of the younger generations were crossed with those of a separate and unrelated strain, the methylation and the silencing disappeared in their offspring.

ECONOMIST: Genes are not all there is to heredity

On Friday, dollar borrowing costs increased and crossed a new threshold, one warning sign of strain in the global financial system.

WSJ: Bank Woes Take Center Stage: SNB Reports Dollar Borrowing; UBS, Credit Suisse Deny Tapping Facility