Recently, … has been brought into focus 最近，⋯⋯引起關注。
Recently, the problem of long working hours has been brought into focus as many of our colleagues are leaving office very late.
There are multifarious reasons to which … can be ascribed, with … being the most convincing one ⋯⋯是由多種原因所構成的，而⋯⋯是最有說服力的一項。
There are multifarious reasons to which the rise of athleisure can be ascribed, with influence of celebrity endorsement being the most convincing one.
It might also be noted that… 同樣地，可以留意⋯⋯
It might also be noted that the rise of athleisure is not possible without the growing fitness trend on social media.
It is well-known to us that… 眾所周知，⋯⋯
It is well-known to us that Hong Kong people are not watching stage show is due to hustle and bustle of daily life.
今次學完 topic sentence，大家加以練習之後，下次就學埋總結句啦！