形容詞 sleek:

1. having a smooth, gleaming surface
   同義詞：glossy, satiny, sleek, silken, silky, silklike, slick
2. well-groomed and neatly tailored; especially too well-groomed
   同義詞：sleek
3. designed or arranged to offer the least resistant to fluid flow
   同義詞：streamlined, aerodynamic, flowing, sleek