Within this small patch of aspen trees, the floor was littered with leaves and it caught my eye.
He pointed south across the Yellowstone River valley to a tiny dot of willow and aspen that seemed to explode in brilliant yellows against the backdrop of prairie tans and grays.
It burns itself out instantly after the match is lit but generates enough heat to ignite the aspen shank.
2002年，美國太空署成立了山楊氣凝膠公司(aspen Aerogel)生產更堅固、更易用的氣凝膠產品。
I just wanted to send something new to this web site. I was in Park County, Colorado and came across this aspen that had shimmering bright orange leaves.
僅一個月前，葛蘭素史克獲得南非仿製*製造商阿斯彭(aspen) 16%的股份。
It includes some of the world's largest stands of fast-growing aspen trees, which can gain 5 feet (1.5 meters) in a year.
The trees had been thinned to increase aspen tree regeneration.
Yellow aspen leaves reflect brightly off the morning sun.
