据卢卡说，海洋是种植植物的好地方，因为水下温度较为稳定，昼夜变化很小。
According to Luca, the sea is a good place to grow plants because underwater temperatures remain stable, changing little from day to night.
这两种装置在阳光充足的气候条件下工作良好；但在北欧，太阳可能一次被云层遮挡数周，而温度不仅随着季节变化，而且还随着昼夜变化。
Both these devices worked well in sunny climates; but in northern Europe, the sun may be hidden by clouds for weeks at a time, while temperatures vary not only seasonally but from day to night.
昼夜变化发生率约50%。
目的探讨老年人血压昼夜变化的稳定性。
Objective To explore the stability of nocturnal blood pressure variation among the aged.
昼夜变化：病人心境有昼重夜轻的变化。
11 day and night changes: the mood of the patient has day heavy light change.
土壤温度成为影响土壤呼吸的昼夜变化主要环境因子。
Soil temperature was the mainly factor controlling the diurnal variation of soil respiration.
目的：确定正常个体中上下眼睑周围泪河凹面的昼夜变化。
PURPOSE: To determine diurnal variation of tear menisci around upper and lower eyelids in normal subjects.
目的探讨老年高血压患者的血压昼夜变化与心率变异的关系。
Objective To study the relationship between the circadian rhythm of blood pressure and the heart rate variability in elderly hypertensive patients.
大风天气，分子氨含量昼夜变化明显，但垂直分布差别不大。
At cloudy day, however, the diurnal fluctuation and the vertical distribution of non-ionized ammonia concentration at different water depth have little difference.
指出纬向梯度、经向梯度、全梯度矢量的昼夜变化与季节特性。
The latitudinal and longitudinal gradients, their diurnal variations and seasonal characteristics are dealt with.
设计具有和缺乏温度梯度两种热环境，研究幼龟体温昼夜变化和体温调节。
Two thermal environments, one with and the other without thermal gradients, were designed to study diel variation in body temperature (Tb) .
本文并讨论了复眼光感受器结构昼夜变化的功能意义，以及与自然光照的关系。
The functional significance of the day and night changes of the photoreceptors and their relations to natural light illumination were discussed.
积极调节、改善非杓型高血压病人血压昼夜变化的功能，对防止靶器官损害更具有临床意义。
The regulative function for diurnal blood pressure variations should be improved to prevent the target organs damage in non-dipper type hypertension patients.
方法：将68例原发性高血压I期和II期病人，按照血压昼夜变化分为杓型组与非杓型组。
Methods:According to 24 hours ambulatory blood pressure monitoring (ABPM), 68 patients with essential hypertension in stages I and II were classified as dipper type group and non-dipper type group.
多枝柽柳的茎干液流呈单峰曲线型，有明显的昼夜变化规律，茎干液流随环境因子变化而波动；
The stem sap flow of T. ramosissima presented a single-peaked curve, with an obvious day and night variation rhythm and fluctuated with environment factors.
目的：研究生长发育期大鼠，在不同时间段戴用功能矫治器，其血中骨钙素含量的昼夜变化规律。
Objective: The aim of this study is to investigate temporal and spatial change patterns of osteocalcin in serum of young growing SD rats, in conditions of different functional treatment time spans.
实验测定了花的耗氧率和窒息点，并对耗氧率的昼夜变化规律以及体重对其窒息点的影响进行了研究。
The oxygen consumption rate(OCR) and the effect of body weight on the asphyxiant point(AP) of Hemibarbus maculatus Bleeker were studied.
人为控制环境下，对玉米幼苗叶片中电解质外渗率、MDA含量以及保护酶活性的昼夜变化同步进行了测定。
The diurnal variations of electrolyte leakage, MDA concentration and cell defense enzyme in leaves of maize seedling were synchronously measured under the artificial conditions.
目的研究阻塞性睡眠呼吸暂停综合征（OSAS）患者心率变异性（HRV）昼夜变化，探讨利用HRV指标筛选OSAS的效果。
Objective To investigate daytime and nighttime variation of heart rate variability(HRV)in patients with obstructive sleep apnea syndrome(OSAS), and to evaluate the screening capacity of HRV.
结果正常人非线性参数中存在明显的昼夜变化，冠心病患者昼夜变化程度减低，而糖尿病伴植物神经性病变患者昼夜变化规律消失；
Results The non-linear indices in healthy control had obvious day-to-night change, while the change in coronary artery disease patients was deceased and disappeared in diabetics.
虽然两种证型皆呈现昼高夜低的特点，但肝阳上亢型昼夜比显著高于阴虚阳亢型，可见肝阳上亢型血压昼夜变化大，而阴虚阳亢型变化较小；
Although both manifest a high volume during the day and low volume at night, the ratio in the former is markedly higher than that in the latter, which prove a bigger variation in the former.
这是一种被称为睡眠类型的昼夜节律的良性变化。
This is a benign variation within circadian rhythms known as a chronotype.
这些时段被称为“日光时”，因为它们的持续时间随着不同季节而带来的昼夜长短的变化而改变。
These periods became known as temporal hours, because their duration varied according to the changing length of days and nights with the passing of the seasons.
白天和黑夜被分为均等数量的部分，所以除去昼夜平分点，白天和黑夜时间是不等的；当然，这些时长也因季节变化而变化。
Day and night were divided into the same number of parts, so that except at the equinoxes, days and night hours were unequal; and then of course the length of these hours varied with the seasons.
即便是街灯、满月，或者邻居家传来的微弱光线，也能干扰入睡所需的昼夜节律变化。
Even the barely noticeable ambient light from streetlights, a full moon, or your neighbor's house can interfere with the circadian rhythm changes you need to fall asleep.
“据了解，昼夜节律被打乱的生物会产生新陈代谢变化，如果发生在人身上，就会增加心脏病的风险。”Fisher说。
"It is known that animals with disrupted circadian rhythms develop metabolic changes that, if they occurred in people, would increase heart disease risk," Fisher said.
昼夜长短之类的自然变化是如何对野生动物产生如此深刻的生理变化及行为变化呢？
How do natural variations such as the changing day length make such profound alterations to physiology and behaviour?
昼夜长短之类的自然变化是如何对野生动物产生如此深刻的生理变化及行为变化呢？
How do natural variations such as the changing day length make such profound alterations to physiology and behaviour?
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