标题: 关于双重所有。。。。。 [打印本页] 作者: 格斗 时间: 2010-12-31 11:46 标题: 关于双重所有。。。。。 However, recent investigations have shown that the concentrations of most mRNA's(为什么会出现双重所有啊？) correlate best, not with their synthesis rate, but rather with the equally variable rates at which cells degrade the different mRNA's in their cytoplasm.
作者: sdcar2010 时间: 2010-12-31 11:48
mRNA's is the plural form of mRNA.作者: 格斗 时间: 2010-12-31 22:58
原来如此 这种用法有什么规律么？作者: sdcar2010 时间: 2011-1-1 07:41
Forming plurals of abbreviations
When forming plurals of abbreviated forms:
Form the plural with a lowercase s (never an es). PBXs (not PBXes)
If the abbreviation contains internal punctuation, form the plural with an apostrophe s. Ph.D.'s M.C.S.'s (but CPUs, LANs)
Avoiding periods in abbreviated forms
In general, do not use periods in an abbreviation or acronym unless it can be confused with a word (such as in for inches)."
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"The formation of plurals and possessives is usually pretty straightforward, except in the case of abbreviations and acronyms. The following rules should help.
To form the plural of an abbreviation, a number, or a capital letter used as a noun, simply add an 's' to the end.
- A group of MPs - The late 1940s - Mind your Ps and Qs
To form the plural of an abbreviation with periods, a lowercase letter used as a noun, and abbreviations or capital letters that would be ambiguous or confusing if the 's' alone were added, use an apostrophe and an 's'.
- A group of M.P.'s - The x's in the equation - Sending SOS's"
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"roper Use of the Apostrophe to Form Plurals
An apostrophe is also used to form some plurals, especially the plural of letters, symbols, and digits.
- Regina received four A's on her report card. - Timothy used too many &'s in his paper. - The judges gave the diver two 9's and two 8's.
It is no longer considered necessary or even correct to create the plural of years or decades or abbreviations with an apostrophe.
- He wrote several novels during the 1930s. - There are fifteen PhDs on our faculty. - My sister and I have identical IQs.
(If you wrote Ph.D. with periods, you would add an apostrophe before the pluralizing 's': Ph.D.'s) If the abbreviation ends in 'S,' it's a good idea to separate this final 'S' from the pluralizing 's' with an apostrophe: SOS's"
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It should be noted that, in this matter, the New York Times does not observe the generally-accepted rules:
"Use of plurals is another area of confusion to authors and editors. As with everything, Chicago/Turabian style takes precedence in this project. One area of specific confusion when it comes to computer terms is with acronyms. Most people mistakenly add an apostrophe and letter 's' to make an acronym plural. The major proponent of this incorrect method is 'The New York Times,' even though all publishing houses and computer magazines agree that it is wrong.
The correct method is just to add the letter 's' to the acronym. Here are some examples:
roper Use of the Apostrophe to Form Plurals