Pluto is not included in either category, because its great distance from Earth and its smallsize make this planet's true nature a mystery.
冥王星不属于这两类，因为它离地球太远，体积又小，使得它的真正性质成为一个谜。
2
The maternal strategy evolved by harbor seals may have to do with their smallsize and the large proportion of their fat stores depleted in lactation.
麻斑海豹进化出的母性策略可能与它们的小体型和哺乳时消耗掉的大部分脂肪有关。
3
The small is $3.50 and the large is $5. It's a tough decision: the smallsize may not last you through the whole movie, but $5.50 for some sugary drink seems ridiculous.