In 1981 it launched the first mass-produced mountain bike.

在1981年，首款大批量生产的山地车投放市场。

《柯林斯英汉双解大词典》

The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.

第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。

youdao

Sina Weibo experienced its first mass virus attack at around 8pm this evening.

新浪微博于今晚8点钟遭受了第一次大规模的病毒袭击。

youdao

The company is making Aprovecho's first mass produced stoves.

VOA: special.2010.02.01

I know that if the second mass moved faster than the first one, then the picture is completely wrong.

因为我知道如果第二个物体比第一个运动更快,那么受力图就肯定不是这样了

耶鲁公开课 - 基础物理课程节选

First is the body mass index, you're going to see this a lot and you--some of you probably know about it already because it's out there in the popular literature.

首先是体重指数,我们会经常碰到这个概念,你们也许已经知道这个概念了,它经常在科普读物中出现

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Successful mass customisers first find out what limits their customers are happy to live within, and then organise their operations accordingly.

ECONOMIST: Idea

Now a full-blown race to become the dominant MOOC is well underway, with Coursera, World Education University, Udacity, edX and many others competing for critical mass and first-mover advantage.

FORBES: Distance Learning Has Been Around Since 1892, You Big MOOC

OnLive has finally issued an official statement after rumors of mass layoffs first leaked out earlier today, confirming that its assets have been acquired into a newly-formed company with what it claims is "substantial" financial backing.

ENGADGET: OnLive hits reset after being dragged down by expensive servers, confirms service will continue