"lm" 怎么发音
word
/ˈɛl ˈɛm/
EL-EM
/ˌɛlˈɛm/
el-EM
释义
'lm' is the symbol for 'lumen,' a unit used to measure the amount of visible light produced by a source.
IPA 音标
美式英语
/ˈɛl ˈɛm/
英式英语
/ˌɛlˈɛm/
简化发音
美式
EL-EM
英式
el-EM
语境中听
This light bulb gives 800 lm of brightness.
LED lamps often show their lm level on the package.
A flashlight with more lm is brighter.
How many lm does this lamp use?