steradian

/stəˈreɪdiən/

Meanings

noun

立体弧度，球面度

In the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r2. Symbol: sr

Examples :

"The lamp's reflector concentrates the light into a solid angle of approximately one steradian, providing focused illumination. "

这盏灯的反射器将光线集中在一个大约一个球面度 (lì tǐ hú dù) 的立体角内，从而提供集中的照明。

Related Words

subtended verb

/sʌbˈtɛndɪd/ /səbˈtɛndɪd/

正对，对向，对

"The angle formed by looking at the top and bottom of the flagpole from where I stood subtended the entire height of the flagpole. "

从我站立的地方看旗杆的顶部和底部所形成的夹角，正好对着旗杆的整个高度。

approximately adverb

/əˈpɹɒk.sɪ.mət.li/ /əˈpɹɑk.sɪ.mət.li/

大约，大致，左右。

"...approximately 60 beats per minute."

...大约每分钟60次。

reflector noun

/ɹɪˈflɛktə(ɹ)/

反射器, 反光板

"The cyclist wore a bright yellow vest with a reflector on the back to be easily seen at night. "

骑自行车的人穿了一件亮黄色的背心，背上带有一个反光板，以便在夜间容易被看见。

providing verb

/pɹəˈvaɪdɪŋ/

挣钱，养家糊口。

"It is difficult to provide for my family working on minimum wage."

靠最低工资挣钱养家糊口是很困难的。

surface noun

/ˈsɜːfɪs/ /ˈsɝːfəs/

表面，表层

"The smooth surface of the kitchen table was perfect for setting the dinner plates. "

厨房餐桌光滑的表面非常适合放餐盘。

concentrates noun

/ˈkɑnsənˌtɹeɪts/ /ˈkɑnsənˌtɹeɪts/

浓缩物，精华。

"Many breakfast juices are made from concentrates, which are diluted with water before drinking. "

很多早餐果汁都是用浓缩果汁制成的，饮用前需要用水稀释。

derived verb

/dɪˈɹaɪvd/

获得，取得，源于。

"The student derived the answer to the math problem from the formula. "

这个学生从公式推导出了这道数学题的答案。

system noun

/ˈsɪstəm/

系统，体系。

"There are eight planets in the solar system."

太阳系里有八颗行星。

illumination noun

/ɪˌluːməˈneɪʃən/ /ɪˌluːmɪˈneɪʃən/

照明，光照.

"The street's illumination helped me see clearly as I walked home at night. "

这条街的照明让我晚上走路回家时看得非常清楚。

focused verb

/ˈfoʊkəst/ /ˈfoʊkəsd/

集中，专注于。

"I have to focus on my work."

我必须集中精力工作。

international noun

/ˌɪntəˈnæʃ(ə)n(ə)l/ /ˌɪntɚˈnæʃ(ə)n(ə)l/

国手，国际选手。

"The United team includes five England internationals."

联合队包括五名英格兰国手。

portion noun

/ˈpoəɹʃən/ /ˈpɔːʃən/ /ˈpɔɹʃən/

部分，份额。

"The recipe called for a specific portion of flour, not the entire bag. "

这个食谱要求的是特定份额的面粉，而不是整整一袋。