停用词是一些常用的单词，如冠词（a、an、the）、介词（of、in、for、through）和代词（it、their、his）等，不能作为单个单词在“主题”和“标题”字段中检索。如果短语中包括停用词，则停用词将被视为单词占位符。

A ABOUT ABOVE ACCORDING ACROSS ACTUAL ADDED AFTER AGAINST AHEAD ALL ALMOST ALONE ALONG ALSO AMONG AMONGST AN AND AND-OR AND/OR ANON ANOTHER ANY ARE ARISING AROUND AS AT AWARD AWAY BE BECAUSE BECOME BECOMES BEEN BEFORE BEHIND BEING BELOW BEST BETTER BETWEEN BEYOND BIRTHDAY BOTH BUT BY CAN CERTAIN COME COMES COMING COMPLETELY CONCERNING CONSIDER CONSIDERED CONSIDERING CONSISTING DE DEPARTMENT DER DESPITE DISCUSSION DO DOES DOESNT DOING DOWN DR DU DUE DURING EACH EITHER ESPECIALLY ET FEW FOR FORWARD FROM FURTHER GET GIVE GIVEN GIVING HAS HAVE HAVING HIS HONOR HOW IN INSIDE INSTEAD INTO IS IT ITEMS ITS JUST LET LETS LITTLE LOOK LOOKS

MADE MAKE MAKES MAKING MANY MEET MEETS MORE MOST MUCH MUST MY NEAR NEARLY NEXT NOT NOW OF OFF ON ONLY ONTO OR OTHER OUR OUT OUTSIDE OVER OVERALL PER POSSIBLY PT PUT REALLY REGARDING REPRINTED SAME SEEN SEVERAL SHOULD SHOWN SINCE SO-CALLED SOME SPP STUDIES STUDY SUCH TAKE TAKEN TAKES TAKING THAN THAT THE THEIR THEM THEN THERE THEREFROM THESE THEY THIS THOSE THROUGH THROUGHOUT TO TOGETHER TOWARD TOWARDS UNDER UNDERGOING UP UPON UPWARD VARIOUS VERSUS VERY VIA VOL VOLS VS WAS WAY WAYS WE WERE WHAT WHATS WHEN WHERE WHICH WHILE WHITHER WHO WHOM WHOS WHOSE WHY WITH WITHIN WITHOUT YET YOU YOUR

示例

pH of soil 查找主题字段中包含 pH 和 soil 的所有记录。例如：

pH of soil；
pH and soil；
pH alluvial soil；
soil pH；
等等。

系统忽略单词 "of"，因为它是停用词。

vitamin A 查找“主题”字段中包含单词 vitamin 的所有记录。字母 "A" 被忽略。

出版物名称检索

进行“出版物名称”检索时，停用词将被视为单词，因此可以在检索式中使用。