11.   Small traces of anthrax have been found in a U.S. diplomatic mail bag in Vienna, an Interior Ministry spokesman and the U.S. Embassy said Thursday.

12.   The scientist continued the check and a small trace of RDX was found.

13.   The soil in the experiment resembles what is known about Martian dirt, with no organic nutrients and only a small trace of water.

a. + trace >>共 154
chemical 7.02%
last 6.43%
minute 4.97%
small 3.80%
visible 3.80%
only 3.51%
faint 3.22%
slightest 3.22%
tiny 1.75%
measurable 1.46%
small + n. >>共 1140
business 4.25%
group 4.22%
town 3.18%
amount 2.42%
number 2.42%
company 1.95%
child 1.74%
bowl 1.43%
craft 1.15%
part 1.00%
trace 0.02%
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