這句子前半部大致沒有問題
但what it was expected to就有保留
首先是it這個代名詞
相信應(yīng)當(dāng)是指the materials
若是如此
應(yīng)當(dāng)用they
而且時式較宜用‘現(xiàn)在時’
再從整個短句來看
以改動最少的原則而言
可以考慮用2個方法來表達(dá)
其一是用when
即till when they are expected to
其二是用what
即till what they are expected of
(句子原為they are expected of sth,將sth用what代替,再調(diào)在開首而成)
所以不應(yīng)用to,而是要用of
至於較大的改動
可參考o(jì)xd_bxo的方法
略為改成
Deterioration could cause the decrease in (the shortening of) the minimum performance period of building materials ,which means the materials will last shorter than they are expected.
或
Deterioration could decrease (shorten) the minimum performance period of building
materials ,which means the materials will last shorter than expected.
希望有達(dá)人在這問題上給意見