光定，西夏神宗英文皇帝李遵顼的年号，历时十三年（公元1211—1223年）。
实时荧光定量PCR Real-time PCR ; real-time fluorescent quantitative PCR ; real-time quantitative PCR ; Real-time quantitative reverse transcription-PCR
曝光定时器 exposure timer
荧光定量 qRT-PCR ; CT-DNA ; Fluorescent quantitative ; NGH-DNA
激光定位器 laser locator
激光定位 laser positioning ; laser location
荧光定量PCR仪 real-time qPCR ; Real time PCR
荧光定量聚合酶链反应 fluorescence quantitative polymerase chain reaction ; FQ-PCR ; fluorescence quantitative PCR
光定向耦合器 optical directional coupler
激光定星镜 laser coelostat
电光定向耦合器 electro-optic directional coupler
某些植物种类如果感觉到了太多光就不开花，而有些只有感觉到了一定程度的光才会开花。
Certain plant species won't flower if they sense too much light and some plants will only flower if they sense a specific amount of light.
你可以思考“光”，但是它并不一定意味着你就是光。
You can think light, but it does not necessarily mean that you ARE light.
黄瓜喜光，但具有一定的耐弱光性。
Cucumber enjoy light, but can bear weak light comparatively.
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