11.   The gene had been incorporated into a low dose of a simple virus that has never been associated with human disease.

v. + gene >>共 269
identify 6.37%
carry 6.07%
find 5.70%
insert 4.60%
have 4.60%
contain 3.25%
add 2.82%
use 2.33%
isolate 2.08%
turn 2.02%
incorporate 0.67%
incorporate + n. >>共 718
element 3.91%
technology 3.40%
feature 2.65%
company 1.64%
change 1.07%
material 1.01%
idea 0.95%
standard 0.82%
information 0.82%
number 0.76%
gene 0.69%
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