秘诀在于发夹型分子的螺旋结构。

The secret is the composition of the hairpin's turn.

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在加州大学圣地亚哥分校的外科医生阮权的帮助下，钱博士在携带乳腺癌的老鼠身上试验了发夹型分子染色颗粒。

With the help of Quyen Nguyen, a surgeon based at UCSD, Dr. Tsien has tested the hairpin dye on mice that had had breast cancer-induced in their bodies.

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八个U型急转弯道(hairpin，又称发夹弯道)，同时31.5%的路面坡度令人毛骨悚然，旧金山伦巴第街(Lombard Street，又称九曲花街)是汽车测试最为困难的路段之一。

With its eight hairpin turns negotiating a hair-raising 31.5 per cent gradient, San Francisco's Lombard Street is one of the toughest tests drivers can face.

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