1. The best way to open an envelope is to slit it at the top.
    拆信的最好方法是在顶部拆开。

2. The continents form rugged tablelands which stand nearly three miles above the floor of the open ocean.
    大陆构成了崎岖不平的高地, 这些高地几乎高出广阔的海洋的洋底3英里.

3. The office is open 9:00 to 5:00 on weekdays.
    办公室在工作日从九点到五点办公。

4. The river is too wide to swim across.
    河太宽，游不过去。

5. They were open- and rolling wildly. His face was as gray as ashes.
    他的眼睛睁得大大的，眼球使劲地转来转去。他面色苍白，象死灰一样。

6. The open sea was deep and mysterious, and anyone who gave more than a passing thought to the bottom confines of the oceans probably assumed that the sea bed was flat.
    无边无际的海洋深邃而又神秘，凡是稍稍想过大海海底的人大概都会认为海底是平坦的。

7. The continents form rugged tablelands which stand nearly three miles above the floor of the open ocean.
    大陆是崎岖不平的高地，高出辽阔的海洋海底近三英里。

8. The undulating waves of the open sea are generated by three natural causes: wind, earth movements or tremors, and the gravitational pull of the moon and the sun.
    公海上起伏的波浪是由3个自然因素构成的：风、地球的运动或震颤和月亮、太阳的引力。

9. The dealer told him that it had just come in, but that he could not be bothered to open it.
    古董商告诉他那只货箱刚到不久，但他嫌麻烦不想把它打开。

10. There is nothing secretive about the Ombudsman´s work, for his correspondence is open to public inspection.
    司法特派员的工作没有什么秘密可言，他的信件是公开的，供公众监督。