"I never noticed before - your hair has red in it," he commented, catching between his fingers a strand that was fluttering in the light breeze.

“我之前从没注意到过——你的头发带着些红影。”他评价道，手指间抓着的一股细线在微风中轻轻摆动着。

youdao

The first type describes a strand of easy listening that relies on light instrument-only arrangements of pop hits while the latter is purely listening style.

前者是指用轻乐器演奏的流行音乐，全部乐曲听起来轻松愉悦；而后者纯指的是欣赏风格。

youdao

The harder part will be designing a detector that can distinguish between two adjacent letters on a DNA strand, which are half a nanometer apart, a small fraction of the wavelength of light.

FORBES: Magazine Article

The harder part will be designing a detector that can distinguish between two adjacent letters on a DNA strand, which are half a nanometer apart, a small fraction of the wavelength of light (which makes it impossible to see them).

FORBES: Magazine Article