小于

He cannot be under thirty years of age.

他的年龄不会小于三十岁.

Such people often experience less stress than those in the ranks immediately below them.

这些人承受的压力往往小于那些职位仅次于他们的人。

The grain-size distribution of active dune in northwest of China is the fewness of particles ( < 63 μ m) and very little of the particles ( < 10 μ m).

中国西北地区活动沙丘粒度组成小于63μm粒径的颗粒很少，小于10μm的颗粒微乎其微。

Caruncle A fleshy outgrowth from a seed, similar to, but smaller than, an aril.

种阜:外种皮延伸所形成的结构,与假种皮相似但通常小于假种皮.

Less than five percent were of Spanish ancestry.

小于5%的是西班牙血统的人.

A fetus of 20 weeks gestation or a fetus weighing 500 gm is considered abortus.

胎儿孕周小于20周或胎儿体重小于500克的称为流产胎.

It is analogous to carcinomas of the salivary gland tissues.

病患之年龄层分布极广,从婴儿至老年人,但几乎一半病人之年龄小于30岁.

As the surface freezes, the ice floats because it is less dense than water.

当湖面冻结时, 冰由于密度小于水的密度而浮在水面.

The stem has a slightly smaller diameter than the valve bore.

阀杆的直径略小于阀体孔的直径.

Further experimental verification suggested that the con-structed model have higher prediction precision, the relative deviation less than 8% for the CO conversion and C_5~+, less than 9% for methane.

进一步的实验验证表明，模型具有较高的预测精度，CO转化率和C5~+的相对误差小于8%，C1小于9%。

At the sub 90 nm technology node, the gate oxide thickness is expected to be 12-15 Angstrom.

当半导体结点技术发展到小于90纳米时, 栅氧化层厚度将减薄至12到15埃.

In most machines friction consumes effort, with the result that less work is got out than is put in.

在大多数机器中,摩擦要消耗功, 以致造成输出的功要小于输入的功.

The calculated value of P decreases with the increase of the number of waves, e.g., P in the case of two waves is smaller than that of one wave, P of three waves smaller than two waves, etc.

P的算值随波数的增多而趋小，如二波的小于一波的，三波的小于二波的；

The average error is smaller than 13 % by comparing the results of simulation and experiment.

模型平均误差小于13%,可以满足预测需要.

Anionic surfactants on foam stability significantly larger than non-ionic surfactants.

阴离子暗不天活性剂差泡沫的安定性远不小于否离子暗不天活性剂.

He is no less than fifty centimetres round the middle.

他的腰围不小于五十公分.

Under age 40 years with abnormal uterine bleeding and risk factors ( eg, chronic anovulation, obesity, tamoxifen ).

年龄小于40,有异常子宫出血及高危因素 ( 如:慢性无排卵 、 肥胖 、 使用三苯氧胺 ).

A step-down transformer has a turns ratio less than 1.

降压变压器 的匝数比小于1.

Angles of less than 90 degrees are called acute angles.

小于90度的角叫锐角.

In the forest stand whose crown closure is under 0.5, the average value of mean square error is 0.502m, distributed between 0 to 0.7m and the frequency is 82.8% and the frequency whose mean square error is under 1m is 91.4%.

在郁闭度小于0.5林分中，平均中误差为0.502m，集中分布在0~0.7m范围内，频率为82.8%，中误差小于1m的频率为91.4%。

It is quite unusual for a freshman to be younger than eighteen or older than nineteen.

一年级新生小于十八岁或大于十九岁是相当特殊的.

Less than or equal to.

小于或等于的数值关系运算符.

Approximately 2 percent of children, under 18 years of age, have some level of hearing loss.

大约2%的小于18岁的孩子有一些程度上的听力损失.

Subatomic physics deals with all entities smaller than the atom.

亚原子物理学研究一切小于原子的客体.

A soil having a uniformity coefficient smaller than 2 is considered uniform.

均匀系数小于2的土壤可视为均质土.

The distance between parallel cables is at least 0.2 m.

两根平行的传爆线间距离不小于0.2米.

In burning the anthracite, secondary air rate is less than 10 %.

燃烧混煤的在20%左右;对于燃烧无烟煤, 二次风率应小于10%.

While, when the rut depth is lower ( less than 40 mm), the compression deformation ratio of binder course is lower than that of wearing course.

当车辙深度较浅（小于40mm）时，下面层的压缩变形率小于上面层。

The total diameter of cavitation, if present, is less than 4 cm.

若出现空洞, 其直径总和小于4厘米.

They may be substantially smaller or larger than this number.

它们可显著地小于或大于这个数.