Tom is a student and he can buy a fitness band for 640 yuan.

汤姆是一个学生，他可以花640元买一个健身带。

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More than 640 kilometers, about 400 miles, from the ocean, a full-size mock-up sits next to a lake in Wuhan.

远在大连640公里约400英里之外的武汉，有一个和这艘航母同样大的它的模型矗立在湖边。

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In Australia, recent estimates show that eucalyptus forests in cooler regions such as southern NSW, Victoria and Tasmania have a carbon-carrying capacity of about 640 tonnes a hectare.

近期的评估报告表明，在较为凉爽地区，例如澳洲新南威尔士州、维多利亚及塔斯马尼亚等地的桉树林大约有640吨/公顷的碳储存能力。

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Wicket-keeper Mahendra Dhoni, who hit 92 from 81 balls, said India would have to work hard to secure a victory, despite taking a 640-run first innings lead into day three.

BBC: Kumble aims to finish off England

With similar styling to the previous Viper, albeit with an all-new carbon-fiber and aluminum skin, the new Viper comes blazingly powered by an all-aluminum, mid-front-mounted 8.4-liter V10 engine that puts a rocket-like 640 horsepower and 600 pound-feet of torque to the pavement.

FORBES: 2013 Viper Priced Below Corvette ZR1

What our man Pascal Brisset did is design a Linux system around a Gumstix Overo Fire computer-on-module, a Vuzix VR920 head-mounted stereoscopic 640 x 480 display (complete with 3D tilt sensor and 3D magnetic compass), WiFi, and Bluetooth modules -- the whole shebang resides in (and on) the eyewear, just the thing for secure telepresence and augmented reality applications (or just extra-private web browsing).

ENGADGET: Homebrew head-mounted Linux system for telepresence, looking silly