discharge 是“（電、熱）散發(fā)出” 或 “放出（電、熱）”的意思,和generate 意思相近.所以,宜改為：The most troublesome problem is that the heat generated by the chip cannot dissipate as fast as we have ex...為什么要用現(xiàn)在完成時呢？“期待”這個動作先于“熱量散發(fā)”，表示“之前我們已經(jīng)有所期待”，對現(xiàn)在有影響，所以用現(xiàn)在完成時更好。請參考：The news didn't travel as fast as we had expected. （這消息傳播得不如我們所預料的那樣快。）【主句是一般過去時，從句是過去完成時】也可以直接用expected，即 as fast as expected，這樣表達簡潔了，還避免了選擇時態(tài)的問題。