1.Bio-engineering professor Jordan Miller explained why the breakthrough was so important.
breakthrough突破
The company looks poised to make a significant breakthrough in China.
这家公司看来很有把握在中国取得重大突破 。
2.Tissue engineering has struggled with this for a generation.
struggle with 与...斗争
He is currently locked in a power struggle with his Prime Minister.
他目前陷入了一场同总理的权力之争当中 。