in turn  這個(gè)詞組肯定大家都知道，意思是“俟個(gè)”、“依次”，例如。The

pateints in the waiting room were called in the doctor’s office in turn.候診室的病人俟個(gè)被叫進(jìn)診室就診。

不過in turn還有一個(gè)用法，用于下列結(jié)構(gòu)：

              ……, and this, in turn, ……

             ……, and these, in turn, ……

             ……, which, in turn, ……

 此時(shí) in turn 是承聯(lián)句子的副詞性短語，意思是“反過來又”。 in turn 前后

可用逗號(hào)點(diǎn)開，也可不點(diǎn)開。this、these 和 which 指代前面的名詞的意思。

1）Anxiety about status leads to high levels of stress,  and this in 

   turn leads to health problems.     (this 指代high levels of stress) 

   對(duì)于地位的焦慮導(dǎo)致了高度緊張，這樣（而高度緊張）反過來又導(dǎo)致了健康        問題。

2）Almost everything we do depends on our modern devices, and these in 

   turn depend on scientific principles.  （these指代modern devices）

   我們做的幾乎每件事都取決現(xiàn)代化裝置,而現(xiàn)代化裝置又取決于科學(xué)原理。

3）Economic development is certainly affecting culture and customs, 

   which, in turn,are reacting on what is going on in the economy.         （which指代culture and customs）

   經(jīng)濟(jì)發(fā)展肯定會(huì)影響文化和風(fēng)俗，而文化和風(fēng)俗又反過來作用于經(jīng)濟(jì)。

4）Skin color depends upon a number of variables, each of which, in        turn, is determined by several genes.   (which指代variables)

   皮膚的顏色取決于一些可變因素，而每種可變因素又取決于好幾種基因。

● 如果不是指代前面的名詞，而是指代前面句子的意思，則常用 and this in trun ……表示。

1）He says the company has an obligation to help the local economy, and 

  this in turn helps the company.     

  他說公司有義務(wù)幫助恢復(fù)當(dāng)?shù)氐慕?jīng)濟(jì), 而這反過來對(duì)公司也有好處。

2）The premise is that the more we know about risks, the better we 

   become at managing them, and this in turn reduces our exposure to

   risks.  

   前提是我們對(duì)風(fēng)險(xiǎn)了解得越多，管理風(fēng)險(xiǎn)的能力也越好，而這進(jìn)又會(huì)減小我們

   的風(fēng)險(xiǎn)暴露。

3）Their turbines can be smaller, since not all the air is passing
   through them, and this in turn means they are quieter and use less 

   fuel.

     由于大部分氣體不流經(jīng)渦輪，渦輪的直徑可以減小，這也就意味著此類發(fā)動(dòng)機(jī)

     噪音較低，更省燃油。

4）For instance, an economy that is growing quickly would tend to 

   overheat and this in turn is likely to lead to a higher inflation 

   and asset bubbles.

        例如，一個(gè)增長(zhǎng)快速的經(jīng)濟(jì)體往往容易過熱，而這又可能會(huì)導(dǎo)致更高的通貨膨脹

        和資產(chǎn)泡沫。