In one year I can write about twenty letters to my mother.
在一年里我能给母亲写大约二十封信。
Last year I wrote two letters.
去年我写了两封信。
How many letters you must have occasion to write in the course of the year!
你一年里头得写多少封信啊。
I never saw you much after my third year... only in the letters mostly.
我从三年级之后就没怎么看到你，大多数时间都仅仅用信件联系。
He'd been gone a year now, and his letters were coming less and less.
现在他离家已达一年之久，信却越来越少了。
The letters say "Happy New Year" in several languages.
“这些信件说”新年快乐“在几种语言。”
For the entire group, the mean acuity decrease at 1 year was only 1.3 letters.
在整个观察组中，在1年中的平均视力下降为1.3个字符。
For the entire group, the mean acuity decrease at 1 year was only 1.3 letters.
在整个观察组中，在1年中的平均视力下降为1.3个字符。
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