4

• This important topic is covered in more detail in sections 4. 4 and 4. 5 .
  这个重要问题，将在44及45节中详细论述。
• His mother is disquieted that she has received no letter from him for 4 months .
  4个月了，儿子杳无音信，做母亲的很担心。
• Figs 4. 3 and 4. 4 show examples of segmentation by texture or context .
  图43和图44给出了根据纹理或质地进行分割的例子。
• She pays 2 for them, sells them for 4 and pockets the difference .
  她为它们付了2元钱，又以4元钱卖掉它们，并将差额放入了口袋。
• As a rule of thumb, the minimum device feature is about 4 times the beam diameter .
  一般来说，最小器件图形大约是电子束直径的4倍。
• One night john gutenberg worked until 4 o'clock at his printing press .
  一天夜里，约翰·谷登堡在他的印刷机旁一直工作到早晨四点钟。
• Major farm legislation has been enacted every 4 years or so during the past 45 years .
  过去45年中，大致每4年通过一项重要的农业法。
• Secondary roots emerge on the 4th or 5th day about 4 or 5 cm from the root apex .
  在第四或第五天，距根端大约4或5厘米处发出次生根。
• One possible structure for the arabinogalactan from seps is shown in fig. 4 .
  图4表示从SEPS分离的阿拉伯半乳聚糖的一种可能的结构型。
• Write a programme to list all the numbers between 11 and 99 which are divisible by 4 .
  写一程序：列出11到99之间可被4除尽的所有各数。