Both oil and gas are less dense than water, so they generally tend to rise upward through water-saturated rock and sediment.
石油和天然气的密度都比水小，所以二者通常会浮在被水浸泡的岩石和沉积物的表层。
One type of pattern was of a specific density and was to be classified as dense, while the second type of pattern could vary in density, but was always less dense than the first one.
一种图案具有特定的密集度，被归为“密集”类，另一类图案的密集程度不同，但都比第一种的密集程度低。
Magnesium is a liquid but it's less dense than magnesium chloride.
镁是液体，但是它的密度比氯化镁要小。
He asked me the question as to why the moon is less dense than the earth.
他问了我一个问题：月球的密度为什么比地球小？
Warm air is less dense than cooler air so it ends up layered on top of the downward moving cooler air.
热空气比冷空气密度小，因此热空气总在冷空气上方。
A gas cut is inferred only if the mud returning to the surface is significantly less dense than it should be.
只有当返出到地面的泥浆大大低于它实际的密度时才能推断出发生了气侵。
However, the countryside quickly emerges. The jungle is less dense than in Sumatra and contains a wider variety of trees and plants.
巴士很快就驶入了乡村，这里的丛林不及苏门答腊茂密，但有很多种类的树木和植物。
If it can be synthesised, the ice will be about 25 percent less dense than the current lowest-density record-holder, developed by European researchers in 2014.
如果它能够被人工合成出来，那么其密度将比当前的记录持有者轻上25%——目前的最低密度冰由欧洲研究人员于2014年制成。
Air heated by the arc moves upward because it is less dense than the cooler air around it, and it moves at a speed for which the buoyant force and the drag force are equal.
空气加热，电弧向上的动作，因为它是密度较低，较凉的空气靠近它，它的速度移动，其中有浮力和阻力都是平等的。
The JXEs used to store AOT code are generally much larger than the JAR files that hold the class files because native code is generally less dense than the bytecodes stored in class files.
用于存储AOT代码的JXE 文件通常要比存放类文件的JAR 文件大很多，这是因为本地代码一般要比存储在类文件中的字节码密度小。
The denser layers are generally darker than the less dense layers.
较紧密的木层比较疏松的木层颜色更深。
The shift to digital technologies from start to finish is evident in the image quality (digital sometimes looks less visually dense than film) and the ubiquity of hand-held (lightweight) cameras.
从头到尾都转向数字化，影响了画面质量(数字化画面看上去没有胶片稠密)，充斥着手提摄像机的感觉(摄像机轻)。
Stars a little less than that mass are thought to collapse into what are called neutron stars — very dense, dead stars, but not quite so exotic and weird as black holes.
比它小一点的恒星会塌陷为中子星——高密度，无生命的星体，但是没有像黑洞那样那么奇特和不可思议。
People are less active now than they were 30 years ago, and the prence of fast food has given people less healthy, more energy-dense options.
因为人们比30年前更加懒散，快餐的流行也给了人们健康程度降低但热量增加的选择。
People are less active now than they were 30 years ago, and the prevalence of fast food has given people less healthy, more energy-dense options.
因为人们比30年前更加懒散，快餐的流行也给了人们健康程度降低但热量增加的选择。
Agave nectar is more calorie dense than sugar but because it is about forty times sweeter much less can be used to achieve the same level of sweetness.
龙舌兰花蜜的热量密度比食糖高，但因为它具有大于40倍的甜度，更可用于实现同一水平的甜度。
The winter morning is permeated with dense mist. Visibility is less than 2 meters.
冬天的早晨弥漫着浓雾，能见度只有不到2米。
A massive sandstorm has enveloped most of northern China, covering the capital Beijing in a shroud of dense dust and reducing visibility to less than 50 meters in some areas.
一场巨大的沙尘暴席卷了华北大部分地区，将首都北京埋在厚厚的沙尘中，某些地区的能见度甚至低于50米。
A massive sandstorm has enveloped most of northern China, covering the capital Beijing in a shroud of dense dust and reducing visibility to less than 50 meters in some areas.
一场巨大的沙尘暴席卷了华北大部分地区，将首都北京埋在厚厚的沙尘中，某些地区的能见度甚至低于50米。
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