能加since its inception嗎？

兩句都是對的，關鍵是看上下文或者你想要表達什麽，It is a leading company in ...重點是說現在怎麽樣，並不介意從前如何；It has been a leading company in ...表示一直如此。因為你並未加時間狀語，所以馬下人說的情況並不影響你。我的建議是你加一個Since its inception，這樣就明確了：Since its inception, it has been a leading company in ...