Word: tracing
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...Russia , . . there is no trace of formal Jewish organization or institutions . . . There is not a single Jewish newspaper or periodical throughout the length and breadth of the Soviet Union. Hebrew is forbidden. Religious instruction and everything that smacks of religious tradition is under the same ban . . . Everything Jewish is either eliminated or else suffocated under a heavy blanket of official silence...
...disappeared without trace during a P-38 reconnaissance flight to Southern France. He was 44. In a letter found later among his papers, he had written: "I hate this century with all my heart...
...sang sound better than they really were. Younger singers could take pointers from the confident way she wrapped her voice around such oldies as Get Happy, Embraceable You and I've Got You Under My Skin. Not only could she get around a nightclub floor without a trace of a limp, she was spending her spare time on the golf course, trying to regain her low-80s game...
Plutonium is different. When it gets into the human body, it accumulates in the bones and spleen and stays there, gradually killing the tissue cells around it. A mere trace is poisonous. Water containing more than one millimicrogram of plutonium per liter (one part in one trillion) is dangerous. Isolating it does no good: plutonium loses only one-half of its activity in 25,000 years...
Natural tritium is much too scarce to help the makers of hydrogen bombs, who will have to synthesize their tritium, presumably in a chain-reacting pile. The only use for it in sight at present is to trace the vertical motions of ocean currents. Since short-lived tritium originates in the atmosphere, only water that has been on the surface recently should have a full complement of it. Water that has spent many years in the ocean depths should be tritium-free...