When Stevenson followed the carbon-14 trail back in time, he found carbon-14 levels change with the intensity of solar burning.
当史蒂文森依据碳-14的痕迹追溯过去时，他发现碳-14的含量随着太阳燃烧的强度而变化。
But the sun is on our backs. With limited time to wander, why trail down to the grotto when we can see it, all mystery preserved, from the ramparts of the basilica?
这时太阳已经在我们的背后，我们的时间有限，既然在教堂的墙上能看到墓室，我们又何必下去呢，倒不如保留一点神秘感吧。
Keeping track of the changes as they are made allows for a reconstruction of the record at a point in time and gives a full audit trail of a given record.
在发生更改时跟踪更改，可以及时重建记录，从而提供特定记录的完整审计轨迹。
The three-hour guided visits are a walk through time, along a well-designed nature trail past a wealth of exposed fossils dating as far back as the Tertiary, some 40 million years ago.
这三个小时的参观是一次时间漫游，沿精心设计的自然路径以此经过大量的可以追溯到大约4千万年前的第三纪的暴露的化石。
The onus of proving that a company is whiter than white will bring huge time demands and a heavy paper trail with it.19.
要证明一个公司比白纸还要白，会花去大量的时间，提供繁复的案宗证明。
For item types declared as auditable, the repository automatically remembers an audit trail of past states of the item, including the user who saved the item and the time of the change.
对于声明为auditable的项类型，存储库自动记忆该项的过往状态的审核跟踪，包括保存该项的用户和更改时间。
The trail is also well marked out and in good condition; it only takes 90 minutes to hike but you may want to allow more time for lunch and lingering.
那些小径很容易找到并且容易行走；徒步旅行只需要花90分钟但是你可能要为吃午餐和停留观光而预留多点时间。
When I discovered this concept, after much difficulty and trail and error, I realized for the first time how huge it was. And how much people like you and me need to know about it.
经历很多艰辛尝试和错误，当我终于发现这个概念时，我第一次意识到它有多广泛，有多少像你我这样的人需要了解它。
On the campaign trail, I had said at virtually every stop, No one with children who works full-time should live in poverty.
在我的竞选行程中，我几乎每到一地都会说：“任何做全职工作同时养育孩子的人都不应该生活在贫困之中。”
The trail is popular nowadays with hikers, but as we arrived in the Yukon I headed out to it and stepped back in time.
如今这条小道很受徒步者的喜爱，但是当我来到育空地区时，我走到它身边又及时退了回来。
Just like ants that leave a chemical trail each time they bring food back to the nest, we leave real-time feedback each time we visit a page or select (or ignore) a result.
正如蚂每次蚁搬运食物时都会留下化学信号，当外膜浏览某个网页或选择（忽略）某条搜索结果时，也留下了一种实时的反馈信息。
On the campaign trail she surrounded herself with seasoned veterans from her brother's time in power; it looked very much like a family firm at work.
竞选之路上，她周围聚集了很多兄长当政时期的前朝遗老，看上去俨然一个经营中的家族企业。
The pheromone trail gets reinforced every time an ant goes out and comes back, kind of like when you wear a trail in the forest to collect wood.
而这种追踪信息素在每次觅食蚁出去再回来便会增强，有点像你在森林为了收集木材而做标记。
Their college enrollment numbers trail women's: Only 43 percent of American undergraduates today are men. Last year, women made up the majority of the work force for the first time.
而今天，男性的大学入学率也低于女性，美国的在校大学生中仅有43%为男性，去年就业人群中女性所占比率也首次超过了男性。
Thousands of years ago, the great philosopher Mencius said: "a trail through the mountains, if used, becomes a path in a short time, but, if unused, becomes blocked by grass in an equally short time."
数千年前，伟大的哲学家孟子曾经说过：“山径之蹊间，介然用之而成路，为间不用，则茅塞之矣。”
Thousands of years ago, the great philosopher Mencius said: "A trail through the mountains, if used, becomes a path in a short time, but, if unused, becomes blocked by grass in an equally short time.
数千年前，伟大的哲学家孟子曾经说过：“山径之蹊间，介然用之而成路，为间不用，则茅塞之矣。”
The first time on the trail, you were a hiking novice. How do feel you are you different this time?
第一次徒步穿越时，你还是个菜鸟。你觉得这次你有何不同？
Thousands of years ago, the great philosopher Mencius said: "a trail through the mountains, if used, becomes a path in a short time, but, if unused, becomes blocked by grass in an equally short time."
几千年前，伟大的哲学家孟子曾说过：“山径之蹊间，介然用之而成路。”
Mutombo, 42, an 8-time NBA All-Star and 4-time Defensive Player of the Year, was carried away on a stretcher in the first quarter of the Rockets' 103-107 loss to the Portland Trail Blazers.
但比输球更让人沮丧的是，火箭队老将迪肯贝·穆托姆博(见图)在首节膝部严重受伤并被担架抬出场，随后穆大叔宣布他18年的职业篮球生涯结束。42岁的穆大叔战绩辉煌，曾8次入选全明星阵容，4次获年度最佳防守球员。
That day they made forty miles, the trail being packed; but the next day, and for many days to follow, they broke their own trail, worked harder, and made poorer time.
那天它们走了40英里，行程还算内容还算丰富；但是从第二天开始，一直到后来的很多天，他们打破了那种安排，更加努力地工作，休息的时间缩短了。
At the time, Sanford claimed to be hiking the Appalachian Trail.
当时，桑福德声称是去阿帕拉契山脉徒步旅行。
If you have a lot of time on your hands, you can walk the Freedom Trail.
如果您时间充裕的话，可以走一趟自由之路。
In audit course, we should pay attention to trail audit, and offer excellent quality service for construction scene in time.
在审计过程中应注意跟踪审计，及时为施工现场提供优质服务。
In theory, a franchise has blazed the trail already and created a track record of success that you can check ahead of time.
从理论上讲，特许经营已开辟的道路已经创造了成功，你可以检查提前记录。
I had the bike shop install it for me and I was back on the trail in no time.
我有自行车店安装对我来说，我是根据线索，在没有时间回来。
This autumn, he publicly acknowledged for the first time on the campaign trail Mr Obama was born in the United States.
今年秋天，他在竞选活动中首次公开承认奥巴马出生于美国。
This autumn, he publicly acknowledged for the first time on the campaign trail Mr Obama was born in the United States.
今年秋天，他在竞选活动中首次公开承认奥巴马出生于美国。
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