名詞 upper:

1. the higher of two berths
   同義詞：upper berth
2. piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot
3. a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
   同義詞：amphetamine, pep pill, speed

形容詞 upper:

1. higher in place or position
2. the topmost one of two
3. superior in rank or accomplishment

1. The first-stage vehicle is used to launch the rocket and is then jettisoned in the upper atmosphere.
   第一級(jí)運(yùn)載火箭是用來發(fā)射火箭的，進(jìn)入高層大氣後即拋掉。
2. In Britain the upper Chamber is the House of Lords, and the lower the House of Commons.
   英國上院即貴族院，下院即眾議院。
3. Tears are secreted by an organ under the upper eyelid.
   眼淚由上眼瞼下面的器官分泌。
4. He locked his diary in the upper drawer.
   他把日記鎖在上層抽屜里。
5. Passengers may smoke only on the upper deck of the bus.
   乘客只可以在公共汽車的上層吸煙。
6. My hometown is in the upper reaches of the river.
   我的家鄉(xiāng)在這條河的上游地區(qū)。