And it's so vigorous that it grows easily from cuttings.
The effort was so vigorous that it may have undermined itself somewhat.
Trade was so vigorous that the Strand downtown was called "the Wall Street of the Southwest".
"In fact, he was so vigorous that he clashed with scientists and cryptographers over public access to cryptography and freedom to publish in areas of national security science".
The criticism, including calls for Mr. Johnson's resignation, has been so vigorous that the Rev. Calvin O. Butts III felt obliged to comment on it during a fiery sermon yesterday at Abyssinian Baptist Church in Harlem.
To non-Spanish-speaking fans in America, she's known less for playful, spiky rock songs (though Thursday's show had lots of them) and more for breathy ballads or frenetic club tracks or hip-shaking so vigorous that it seems positively lethal.
The dispute has become so heated — and Wal-Mart's defense so vigorous — that officials at OSHA, an arm of the Labor Department, complain that they have had to devote huge numbers of staff time to the case, including 4,725 hours of work by employees in the legal office.
Mission scientists were also caught off-guard by jets of dust from the comet, so vigorous that at one stage Rosetta's star trackers, which help it navigate, were "blinded" and the craft had to be moved away to a safe distance.
And when he said, "We are going to be considerate and compassionate to everyone, but my greatest compassion will be for our own struggling citizens," the chants of "U.S.A.! U.S.A.!" were so vigorous that he joined in and gave the chanters a quick thumbs-up.
Some basic statistics are not encouraging -- about 1.2 billion people still living on less than $1 a day, another 1.3 billion people on $2 -- and the diverse protests stirred by such numbers are now so vigorous that dialogue and compromise have become essential.
