Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
9. WhatFont: Chrome Extension for identifying Any Site FontsWhatFont is a Chrome extension that allows web designers to easily identify and compare different fonts on a page. The first time you use it on any page, WhatFont will copy the selected page.It Uses this page to find out what fonts are present and generate an image that shows all those fonts in different sizes. Besides the apparent websites like Google or Amazon, you'll conjointly use it on sites wherever embedded fonts ar used.
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「如果你被丟到葡萄牙、巴西或任何葡語國家，你所聽到的語言絕不會按照教科書般的順序展示，從問候語開始慢慢展開，」雷布夏特解釋說。「相反地，你會在不同情境中聽到大量語言：有人在咖啡館點餐、街上的對話、背景裡播著足球解說。」