1.Local residents reported that the beluga was extremely tame and enjoyed being petted.
tame顺从的
The deer never became tame; they would run away if you approached them.
那些鹿一直没有被驯服:你一靠近,它们就跑开 。
2.There is much speculation online as to where the whale came from.
speculation 推测
There was widespread speculation that she was going to resign.
人们纷纷推测她将辞职 。