* In giraffes and people, the valves consist of flaps inside the vein that open if blood tries to move in the right direction but that close if blood tries to flow the wrong way.
長頸鹿和人體的瓣膜由靜脈中這樣一些瓣片組成：當血液要向正確的方向流動時，瓣片打開，但是，當血液試圖向不正確的方向流動，則瓣片關(guān)閉。
* If all ozone-depleting chemicals were successfully phased out, the ozone layer would eventually heal itself.
當所有消耗臭氧的化學品都被逐步淘汰，臭氧層最終會自行復原。
* If the distance from the generator to the load is considerable, it may be desirable to install transformers at the generator and at the load end, and to transmit the power over a high-voltage line.
當發(fā)電機距離負載有相當長的距離，最理想的方法是在發(fā)電機和負載端安裝變壓器，并采用高壓線路輸電。?
3. 后置法
英語中也有個別的條件狀語從句往往表示一種補充說明的含義，這樣的條件狀語從句漢譯時可以后置。如：
* The word“velocity”and“speed”are considered as synonyms unless they are used in technical books.
“速度”和“速率”這兩個詞，可以認為是同義詞，如果不是用在科技圖書中。
* Iron or steel parts will rust, if they are unprotected.
鐵件或鋼件是會生銹的，如果不加保護的話。
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