ray; radiation; geometric ray
Tone colorsmāmámǎmàma
Meanings
2 senses · 7 examplesnoun
ray; radiation; electromagnetic or particle radiation
In physics, includes electromagnetic waves (infrared, visible light, ultraviolet, X-rays, gamma rays) and high-energy particle streams (alpha rays, beta rays, cathode rays).
XX
shè射
xiàn线
kě可
yǐ以
chuān穿
tòu透
rén人
tǐ体
ruǎn软
zǔ组
zhī织
。
X-rays can penetrate human soft tissue.
Jiā伽
mǎ马
shè射
xiàn线
jù具
yǒu有
jí极
qiáng强
de的
chuān穿
tòu透
néng能
lì力
。
Gamma rays have extremely strong penetrating power.
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Zhè这
zhǒng种
shè射
xiàn线
duì对
rén人
tǐ体
yǒu有
hài害
，
xū需
yào要
zuò做
hǎo好
fáng防
hù护
。
This radiation is harmful to the human body and requires proper protection.
Yī医
shēng生
yòng用
fàng放
shè射
xiàn线
zhì治
liáo疗
zhǒng肿
liú瘤
。
Doctors use radiation to treat tumors.
noun
ray (geometry); half-line
In mathematics, a ray starts at a fixed point (endpoint) and extends infinitely in one direction. Also called a half-line.
Cóng从
diǎn点
AA
huà画
yī一
tiáo条
shè射
xiàn线
jīng经
guò过
diǎn点
BB
。
Draw a ray from point A passing through point B.
Shè射
xiàn线
zhǐ只
yǒu有
yī一
gè个
duān端
diǎn点
，
xiàng向
lìng另
yī一
fāng方
wú无
xiàn限
yán延
shēn伸
。
A ray has only one endpoint and extends infinitely in the other direction.
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Jiǎo角
shì是
yóu由
liǎng两
tiáo条
jù具
yǒu有
gōng公
gòng共
duān端
diǎn点
de的
shè射
xiàn线
zǔ组
chéng成
de的
。
An angle is formed by two rays sharing a common endpoint.