A less obvious but ubiquitous mass produced service is a computer operating system.
一个比较不明显的但是无处不在的大规模生产的服务是计算机操作系统。
Instead, it is a bright star with a lot less mass.
取而代之的是观点认为，这个明亮的恒星的质量还要小的多。
A liter of gas has less mass than a liter of water.
一公升气体的质量少于一公升水的质量。
They were less certain about stars with more than 10 times the sun's mass.
他们不太确定十倍于太阳以上的星体的形成方式。
A litre of gas has less mass than a litre of water.
一升气体的质量少于一升水的质量。
However, neoplasm was relatively less and malignant mass was rare.
而实质性肿瘤相对较少，恶性者更为罕见。
However, neoplasm was relatively less and malignant mass was rare.
而实质性肿瘤相对较少，恶性者更为罕见。
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