it has been found that

• adv. 已经发现(实验证明)

例句

用作副词 (adv.)

1. At least one avian disease pathogen has been found.
   已经发现至少有一种禽病的病原体。
2. They have found out the mole in the cabinet.
   他们已经发现了内阁中的间谍。