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dolphin n. 海豚 (pl. -s)
A sea animal (a mammal ) that looks like a large fish with a pointed mouth.
Yangtze River dolphin 白鳍豚
a school of dolphins 一群海豚
koala n. 树袋熊；考拉 (pl. -s)
An Australian animal with thick grey fur, large ears and no tail. Koalas live in trees and eat leaves.
koala bear 考拉熊；无尾熊；树袋熊
emotion n.感情；情感；情绪(pl. -s)
A strong feeling such as love, fear or anger; the part of a person's character that consists of feelings
emotion management 情绪管理; 情感管理
emotion quotient (EQ) 情商
unusual adj. 特别的；不寻常的
unusual weather 异常天气
unusual You 不一般的你；不同寻常的你
The first poster uses an ugly picture of an animal to get a reaction from the reader, but then makes the point that this reaction is part of the problem, because all animals should be protected, not just ones we think are cute.
The second has a cute picture and the headline is written as if the koalas were speaking to the reader which may make them more sympathetic.
