1. But a series of new environmental laws, together with the creation of parks and nature preserves that cover one quarter of the country, are aimed at protecting Costa Rica’s remaining forests.
    但是人们制订了一系列新的环境保护法，还新建了占四分之一国土面积的公园和自然保护区，目的是要保护哥斯达黎加现存的森林。

2. The theory is based on a series of wrong assumptions.
    这一理论是以一系列错误的设想为根据的.

3. The telephone rings and this marks the prelude to an unforeseen series of catastrophes.
    电话铃响了，这就揭开了未预料到的大灾难的序幕。

4. Their holiday was ruined by a whole series of misadventures.
    一连串的不幸事故把他们的假日全毁了.

5. The telephone rings and this marks the prelude to an unforeseen series of catastrophes.
    电话铃响了，这就揭开了未预料到的大灾难的序幕。

6. There was a series of bangs as the box fell down the stairs.
    箱子掉下楼梯时发出一连串响声。

7. The telephone rings and this marks the prelude to an unforeseen series of catastrophes.
    电话铃响了，这就揭开了未预料到的大灾难的序幕。

8. The telephone rings and this marks the prelude to an unforeseen series of catastrophes.
    这时电话铃响了。它预示着一连串意想不到的灾难的来临。

9. The UPC is printed by the manufacturer on each grocery item — a set of thin and thick vertical stripes accompanied by a series of numbers under the stripes and a zero, centered to the left of them.
    条形码由厂家印在每一食品上——这是一组粗细不同、垂直排列的线条，线条下方有一组数字，左边有一个“0”字。

10. The first five digits of the other numbers designate the manufacturer and the second series of digits identifies the particular item.
    条形码上的前五个数代表厂家，后面的其它数字是商品代号。