Even then, the penguins are cautious; they stay in the water only long enough to feed, and they're adept at remaining motionless when they're on thin ice and spot a leopard seal.
尽管如此，企鹅也十分谨慎：它们仅仅在捕食时才呆在水下；一旦意识到冰面很薄或是附近出现海豹，它们就会紧紧地趴在冰面上，一动不动。
Oil slicks are notoriously difficult to spot in natural-color (photo-like) satellite imagery because a thin sheen of oil only slightly darkens the already dark blue background of the ocean.
浮油出名的难以被发现在天然色卫星图像上，因为稀薄光泽的石油仅仅略黑于深蓝色的大海。
The bright spot in a drab employment picture is that workers have been stretched so thin during the past couple years that companies are going to have to (gasp!) hire more.
灰暗的就业前景中存在一丝亮点：过去几年雇员人数已压至如此之低，企业将不得不增聘人手(啊哈！)
If the discharge in the transaction, it may be a static ink spot on the printed matter, this situation often appear in thin printing levels.
假如是在异动中放电，就可能在印品上出现“静电墨斑”，在层次的薄版印刷中常出现这种状况。
The chemical composition of the largest spot on thin layer plate was identified by Infrared spectrum, and its content was determined by TLC scanning.
挥发大蒜油在薄层板上分离出的最大斑点的化学成分用红外光谱法定性，用薄层扫描法定量。
The fabrication of thin oxide films has become a hot spot of research in physics of condensed matter.
氧化物薄膜的制备已经成为凝聚态物理学的一个研究热点。
After a study on this hypothesized spring beam, a method for analyzing warping torsion on spot-welded thin-walled box section beam has been presented.
通过对这种具有“假想弹簧”的半闭口截面构件的研究，提出了一种分析点焊箱型截面薄壁构件的翘曲扭转的新方法。
Analysis by thin layer chromatography, original spot hydrolyzed-ninhydrin color, infrared spectrum indicated that the biosurfactant of metabolite after culturing of the strain was lipopeptide.
薄层色谱与原位水解显色和红外光谱分析表明，培养后菌株代谢产生的生物表面活性为脂肽。
Drawing the spot arranges the thin turning the diagram, and personnel's line enters the circuit diagram.
绘制现场布置细化图，及人员行进线路图。
BDN series thin metal belt spot welder is specially designed for joining with thin metal belt.
系列金属薄带专用点焊机是一种为金属薄带连接的专用设备。
In the design of thin-walled spot welding structures such as the automobile body structure, it is necessary to evaluate the fatigue strength of spot welding at the good accuracy.
在设计汽车骨架等薄壁点焊结构时，必须对薄壁构件焊点的疲劳强度进行精确评估。
In the design of thin-walled spot welding structures such as the automobile body structure, it is necessary to evaluate the fatigue strength of spot welding at the good accuracy.
在设计汽车骨架等薄壁点焊结构时，必须对薄壁构件焊点的疲劳强度进行精确评估。
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