1.   At first, Baffert said the learning curve was steep, which explains what happened with Thirty Slews, a sprinter he thought would be his first Derby horse.

2.   Baffert, whose reputation has recently taken a beating, was left to explain what happened.

3.   Robbins, whose analogies tend strongly toward food, explained what happens when something comes unglued.

4.   But no one, he said, has explained what happens afterward.

5.   Those messages, internal military communications, would have shown how military officials in Roswell explained what happened to their superiors, the Republican congressman said.

v. + happen >>共 95
look 19.19%
be 13.66%
wonder 7.85%
know 5.23%
say 4.94%
see 4.36%
study 4.07%
think 2.91%
examine 1.74%
explain 1.45%
explain + v. >>共 36
do 58.27%
be 3.94%
happen 3.94%
people 3.15%
ask 2.36%
say 2.36%
accord 1.57%
agree 1.57%
pipeline 1.57%
change 0.79%
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