The duration of previous geologic periods was difficult to determine.
以前很难确定地质期的持续时间。
Recently, a zinc gel applied nasally has been shown to greatly reduce the duration of colds.
最近，一种应用于鼻腔的锌凝胶被证明可以大大缩短感冒的持续时间。
The length of time of which the eyes stop—the duration of the fixation—varies considerably from person to person.
眼睛停留的时间，即注视的持续时间，因人而异。
By contrast, the audience encounters an opera or a play over a specific time, which is the duration of the performance.
相反，观众可以有一段具体的时间来欣赏话剧或者戏剧，这段时间就是表演的持续时间。
The studies in which parents were asked about daycare and playgroup attendance varied when it came to the timing, duration.
在这些研究中，家长被问及日托和儿童游戏小组的出勤率，在时间、持续时间。
Forgetting clearly aids orientation in time, since old memories weaken and the new tend to stand out, providing clues for inferring duration.
遗忘显然有助于时间的定位，因为旧的记忆会减弱，新的记忆会突显出来，从而为推断持续的时间提供线索。
The difference between the two measures provides the researcher with an indication of the level and duration of the response to the stimulus.
这两种测量方法的差别为研究者提供了对于刺激反应的水平和持续时间的指示。
Participants were balanced across the three groups for age, sex, educational background, severity and duration of depression, and use of antidepressants.
就年龄、性别、教育背景、抑郁症的严重程度和持续时间以及抗抑郁药物的使用这几点来说，这三组参与者都保持了平衡。
Participants were balanced across the three groups for age, sex, educational back-ground, severity and duration of depression, and use of antidepressants.
这三组参与者在年龄、性别、教育背景、抑郁症的严重程度和持续时间以及抗抑郁药物的使用上保持平衡。
Moreover, when the antibody was given to chimpanzees, it inhibited rhinoviral growth, and in humans it lessened both the severity and duration of cold symptoms.
此外，当把这种抗体注射到黑猩猩身上时，它能抑制鼻病毒的生长，而在人类身上，它能减轻感冒症状的严重程度和持续时间。
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.
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。
Exposure to loud noises can definitely produce a partial or complete loss of hearing, depending on the intensity, duration, and frequency composition of the noise.
暴露在巨大的噪音中肯定会造成部分或完全的听力丧失，这取决于噪音的强度、持续时间和频率组成。
Among student subjects who discussed meat ethics, meal purchases containing meat decreased from 52 to 45 percent—and this effect held steady for the study's duration of several weeks.
在参与讨论肉类伦理的学生受试人群中，肉食购买率从52%下降到45%——而且这一影响在研究持续的几周内保持稳定。
The data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.
他收集的数据得出了一个关于房间回声持续时间、吸音材料的数量和质量以及空间体积之间关系的数学公式。
They were incarcerated for the duration of the war.
他们在战争期间被监禁。
His wounds knocked him out of combat for the duration.
在整个战斗中，他的伤一直令他无法参战。
The school was used as a hospital for the duration of the war.
战争期间这所学校被用作医院。
He was given the task of protecting her for the duration of the trial.
他被委以在审判期间保护她的任务。
Here's one shipboard romance that won't last the duration of the cruise.
这是发生在船上不会长过航游时间的一段恋情。
Heavy media use interferes with sleep by reducing sleep duration.
大量使用媒体设备会缩短睡眠时间，从而干扰睡眠。
There is a pillar there of high purity zinc that stood for the duration.
那里有一个高纯度锌的柱子，屹立了一段时间。
For example, the average duration of human life has hardly changed in thousands of years.
例如，人类的平均寿命在几千年里几乎没有改变。
Lasting only ten months before Spain resumed control, Britain's rule was of short duration.
在西班牙重新掌权之前，英国的统治只持续了10个月，执政时间很短。
For example, sleep duration has declined from some 8 hours in the 1950s to 7 in recent years.
例如，睡眠时间从20世纪50年代的8小时左右下降到近年来的7小时。
A particular animal typically maintains its own characteristic cycle duration with great precision for many days.
某一种动物通常可以在很多天内极其精确地保持其特有的周期时间。
This is because middle- and upper- latitude timberlines are strongly influenced by the duration and depth of the snow cover.
这是因为中纬度和高纬度地区的林木线受到积雪存留时间和厚度的强烈影响。
To counter these effects on a long-duration mission, say, Mars, astronauts will certainly need to create their own artificial gravity.
比如在火星上，为了在长期任务中对抗这些影响，宇航员肯定需要人为制造重力。
In conversations, interpersonal coordination is found when people adjust the duration of their utterances and their speech rate to one another so that they can enable turn-taking to occur.
在交谈中，人际间的协调性表现在其对说话时长和说话速度的调整上，这样做能够使对话进行下去。
The sporogony duration of Plasmodium vivax in An. sinensis were observed.
观察疟原虫的产孢期。
建议期限：12个月。
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