Mr Crystal, in his book, recounts an attempt to work out how many words the average native English-speaker does know.

在他的书中，克里斯特尔重新尝试确定一个以英语为母语的普通人认识多少个单词。

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The embedded speaker system in the Vybe provides crystal clear sound and a control panel to allow for adjustments in the sound volume and intensity of the tactile sensations.

ENGADGET: Vybe gaming pad packs Disney Research's Surround Haptics into a $99 force feedback accessory

Consumers can now enjoy crystal clear sound wherever they are with the DA-F60 portable wireless Bluetooth speaker.

ENGADGET: Samsung, Flo Rida introduce massive Giga Sound MX-FS9000 speakers (update: hands-on video)