1. 低等动物：哺乳动物 mammal; mammalian; suckler | 低等动物 lower animal | 浮游动物 zooplankton
1. Even just petting an animal - or enjoying its presence - can help lower pulse rate and blood pressure.
2. When the tomb was excavated in 2001, the animal remains were believed to be the lower jawbone of a pig.
3. People try to recognize human and animal shapes in the lower part of the tree, which looks like it has been carved.