A-type sentron A的用法和样例：
- So as to conform to a type, standard, or pattern.
- Frankincense is a type of sweet-smelling gum from a tree.
- Ostrich is a type of large bird that can run very fast.
- The juniper is a type of evergreen bush with purple berries.
- She is pecking away at the keys of a type writer.
- An elm is a type of large tall broad- leave tree.