hitherto
adv. 迄今,至今
例句
The ruling party is likely to be opened up to let in people hitherto excluded.
执政党可能会放开政策,吸纳迄今被排斥在外的人士。
《柯林斯英汉双解大词典》
How does the author view the hitherto high click-through rates?
作者如何看待迄今为止的高点击率?
Hitherto he had thought it was some fiend fighting him, but darker suspicions assailed him now.
到目前为止,他一直以为是魔鬼在跟他搏斗,但现在更阴暗的怀疑向他袭来。