例如，往返于通勤硅藻只在白天出现低潮时出现。
Commuter diatoms, for example, emerge only during those low tides that occur during the day.
但是只在白天出去进攻。
但是，这些野外活动都只在白天进行；
通知是不突兀和服务只在白天的时间。
Notifications are non-obtrusive and served only during the day time.
我只在白天和晚上这两个时刻会想你。
I will miss you on only two occasions, that is day and night.
这是因为只在白天太阳的热量是可用，必须收集足够热水满足晚上和早晨的要求。
This is because only the heat of the sun during the day is available, and enough hot water must be collected to meet the requirements of the evening and morning.
在古时候，人们只在白天工作，从黎明工作到傍晚，如果按十二小时来粗略计算，就是从早上六点工作到下午六点。
In olden times, people worked only during daytime from dawn to dusk, or roughly speaking during the twelve hours from six o 'clock in the morn to six o 'clock in the afternoon.
这项与传统观点截然不同的发现刊登在最近一期的《科学》杂志上——传统的观点认为，为了保存能量，肉食恐龙只在白天活动，而把夜晚留给了那些小型的哺乳动物。
The discovery, published in the latest issue of Science, counters the traditional view that, in order to conserve energy, these animals were active only by day, leaving the night to small mammals.
白天他们都睡在棺材里面，只在夜里出来活动。
这项研究集中于只在夜间出现的一种氮氧化物的具体形式，这种氮氧化物在白天即使阳光极微弱也会被分解。
The research focuses on a specific form of nitrogen oxides present only at night — during the day it is broken down by even the faintest sunlight.
自然我们对过往船只很感兴趣，但是在过去的五周里我们只看见过四艘船，而且都是在白天看到的。
Naturally we're interested in passing ships, but we've seen only four in the past five weeks, all in daytime.
一只美洲狮在美国亚利桑那州纪念谷的一处岩石上漫步。和大部分沙漠动物不同，美洲狮在白天十分活跃。
A mountain lion swaggers across an outcropping in Arizona's Monument Valley. Unlike most other desert animals, mountain lions are active during the daytime.
只在夜间睡眠。尽可能避免白天睡觉。白天小睡会把夜间的熟睡时间偷走几个小时呢。把白天的睡觉时间限定为20分钟，权当一个恢复体力的小盹。
Sleep only at night. Avoid daytime sleep if possible. Daytime naps steal hours from nighttime slumber. Limit daytime sleep to 20-minute, power naps.
吹起笛子！现在它无声无息。白天夜晚小鸟儿喜欢。有一只夜莺在山谷深深。
Sound the Flute! Now it's mute. Birds delight Day and Night. Nightingale in the dale.
一只受到打猎与人类侵犯而备受排斥的欧洲野猫在摩尔多瓦白天猪食时间小憩下。
European wildcat, marginalized by hunting and human encroachment, pauses during a daylight hunt in Moldova.
我愿成为一只萤火虫，即使是在白天，不管阳光多么耀眼，我的光芒也将无法阻挡。
I will become a firefly and even in the day my glow will be seen in spite of the sun.
一天晚上，一只蝙蝠飞来了。他问，“你为什么在白天。”
我要成为一只萤火虫，即使在艳阳高照的白天，我也要发出光芒。
I will become a firefly and even in the day my glow will be seen in spite of the sun.
在国旅的时候，我觉得自己就是一只丑小鸭，和一群白天鹅在一起。
While working in CITS, I felt myself being like an ugly duck walking with a group of grace swans.
在白天只须让这五个灯亮着。
在白天的时候，它们躲藏在它们的窟里面，避它们的仇敌，就是大鹏，所以只在夜间出来。
In the day_time they hid in their dens from their enemy, the roc, and came out only in the night.
这种新的模式是先有生产本田汽车白天运行灯，他们在欧洲的独家版本只。
This new model is the first production Honda to have daytime running car lights and they are exclusive to the European version only.
我白天的工作完成了，于是我像一只泊在海滩上的小船，静静地聆听晚潮演奏着舞曲。
My day is done, and I am like a boat drawn on the beach, listening to the evening.
直到今天，蝙蝠都生活在岩洞里，白天将自己倒挂着休息或睡觉，因为怕遇到鸟和老鼠，他们只在晚上才出来找食物。
To this day bats live in caves, hanging upside down. And because they don't want to meet Bird or Rat, they come out only at night to hunt for food.
首先，你要知道猫咪在黄昏到黎明这段时间里最活跃，这就意味着它们白天睡觉，黄昏时分就开始活动了。当你第一次带只猫咪回家时，也许会被这样的生活习惯所吓倒。
The first thing you should realize is that cats are most active between dusk and dawn, which means that they sleep mostly during the day and become active around twilight.
在湖中一只白天鹅敏捷地捉到了一条缓慢游动地蛇。
A snow-white swan swiftly to catch a slowly-swimming snake in a lake.
在湖中一只白天鹅敏捷地捉到了一条缓慢游动地蛇。
A snow-white swan swiftly to catch a slowly-swimming snake in a lake.
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