He started keeping tracks of sunspots, mapping them, so he wouldn't confuse them with any potential new planet.
他开始追踪太阳黑子，标注它们的位置，这样就不会把它们和任何潜在的新行星混淆了。
We were walking along the bank of the Niger river, searching for the tracks of a hippopotamus that was ravaging the corn on Karim's farm.
我们沿着尼日尔河岸走着，寻找一头河马的足迹，它毁坏克莱姆村农场农作物。
The tracks of the large animal were clearly printed in the sand.
这只大动物的足迹清晰地印在沙滩上。
"Each magstripe has three tracks of information," explains payments security expert Jeremy Gumbley, the chief technology officer of CreditCall, an electronic-payments company.
电子支付公司CreditCall的首席技术官、支付安全专家杰里米·冈布利解释说：“每个磁条都有三条信息轨迹。”
The tracks of mountain goats polka-dotted the dust ridge.
山羊的踪迹使土灰色的山脊上布满着斑斑点点。
The earth crosses the tracks of certain comets.
地球穿过某些彗星的轨迹线。
The hunter found the tracks of the wounded fox.
猎人找到那负伤狐狸的踪迹。
We followed the tracks of the rabbit into the woods.
我们循着兔子的足迹进入森林。
Launching tracks of No. 1 lifeboat clear in 10 minutes.
一号艇放艇滑轨在10分钟内畅通。
The hunters followed the tracks of the animal for hours.
猎人循着动物的脚印追了几个小时。
This clue enabled the police to follow the tracks of the kidnappers.
这条线索使警方能够跟踪绑匪的踪迹。
The tracks of the horse's hoofs were seen deeply marked in the dirt.
马蹄的痕迹仍然深深地印在泥土上。
The tracks of his feet, however, make two circles, one inside the other.
而他的脚印形成两个圆圈，一个圆在另一个的里面。
The gas solid contact efficiency was improved by adjusting the flow tracks of catalyst.
通过改变催化剂的流动轨迹达到改善气固接触效率的目的。
Observe the tiny tracks of mice around every stem, and the triangular tracks of the rabbit.
在树干的周围，请注意田鼠细碎的脚迹，还有兔子的三角形的脚迹。
NASCAR RACES generally use oval shaped tracks of different lengths that require turns to the left.
NASCAR赛车的赛道一般是由不同长度的、左转弯的椭圆形赛道组成。
"We remain committed to both tracks of the P Five Plus One dual-track strategy," said Gonzalo Gallegos.
加莱戈斯说：“我们仍致力于5加1的双轨战略。”
Then a demo HTS Maglev test platform was constructed with 4 Maglev units and 2 PM tracks of 7m length.
然后建立高温超导磁悬浮缩比研究试验平台，其包括4个磁悬浮单元和7米双永磁导轨。
The wrinkles of his hands not only show the tracks of time, but the happiness and sorrow of his patients.
蔡医生的手纪录的不光是岁月的痕迹，更多的是不计其数的病人的欢乐与悲伤。
My wife, Daniela, is a poet and carefully tracks of her submissions to journals, contests, and other events.
我的妻子Daniela是一位诗人，她总是仔细地记录她向杂志、比赛和其他活动的投稿。
No, the railway tracks of the Brown Line are all elevated. So the passengers will see the scenery of the City.
不，棕色路线的铁轨都是高架的。所以乘客能浏览市区风光。
Water resources argumentation shows that the management of water resources goes to the tracks of standardization.
水资源论证的实施标志着水资源管理工作走上了规范化、制度化的轨道。
Here, tracks of particle collisions in CERN's Large Hadron Collider, create conditions just moments after the Big Bang.
在CERN(欧洲核子研究中心)的大型强子对撞机上，对粒子碰撞的跟踪为了解宇宙大爆炸之后瞬间情况创造了条件。
And the paper gives a simple formula which can make the ground tracks of the orbit repeat and recover the whole globe.
并且提出了使得地面轨迹形成覆盖循环所需要满足的简要公式。
On a drying lake bed in Victoria, a farmer in 2007 alerted scientists to a major find: well-preserved tracks of a Diprotodon.
2007年一位农民警觉地告诉科学家，在澳大利亚维多利亚一条干涸的河床上有重大发现：多个保存完好的双门齿兽的足迹。
The possible tracks of a particle BXm_(2), sliding down along a free movable concave surface with the mass m_(1) are analyzed.
运用质心运动定理，分析了质点在可自由移动的凹曲面上滑下时，质点对惯性系的运动轨迹方程。
Through analysis and contrast, the far infrared laser radar can be used to find and follow the tracks of the stealth aircraft.
通过分析对比，远红外激光雷达可有效地发现和跟踪隐身飞机。
Often I saw the tracks of a leopard, or recognized its powerful feline smell, and sometimes I heard the soft rasping of its hunting call.
我经常看到豹子的踪迹，或辨出它们强烈的气味，有时候听到它们捕猎的声音。
Often I saw the tracks of a leopard, or recognized its powerful feline smell, and sometimes I heard the soft rasping of its hunting call.
我经常看到豹子的踪迹，或辨出它们强烈的气味，有时候听到它们捕猎的声音。
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