分面浏览：发表日期 |
| 当前检索式 | ((ALL：Urea)) |
| 限定条件 | 无 |
| 2024 1 | 2023 8 | 2022 25 |
| 2021 53 | 2020 62 | 2019 126 |
| 2018 186 | 2017 171 | 2016 208 |
| 2015 189 | 2014 171 | 2013 179 |
| 2012 179 | 2011 185 | 2010 236 |
| 2009 124 | 2008 114 | 2007 104 |
| 2006 73 | 2005 74 | 2004 55 |
| 2003 58 | 2002 63 | 2001 40 |
| 2000 32 | 1999 9 | 1998 17 |
| 1997 17 | 1996 17 | 1995 12 |
| 1994 5 | 1993 13 | 1992 10 |
| 1991 4 | 1990 1 | 1989 2 |
| 1988 3 | 1987 1 | 1986 1 |
| 1984 2 | 1983 3 | 1982 2 |
