Polyurethane membranes modified with silk fibroin protein(SF) and silk fibroin peptide(SP) had good flexibility. They could overcome rigid and brittle weaks of SF membrane.

用丝素蛋白或丝素肽表面改性的聚氨酯膜表现出良好的柔韧性，它能够克服丝素膜刚而脆的弱点；

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Parker's opening offer was a 20% raise over three years, according to Weaks (Parker won't say).

FORBES: Is There Such a Thing as Nonstop Growth?

"We're not going to break the company, but we're not going to work for less than scale ever again, " vows Jon Weaks , president of the Southwest Airlines Pilots' Association.

FORBES: Is There Such a Thing as Nonstop Growth?