1·今天，我删除了1031个Facebook好友。
Today I deleted 1, 031 friends from Facebook.
2·倾向于对别人的权利、财产和安全表现出轻率、忽视的态度。
Tends to show reckless disregard for the rights, property, or safety of others. 031.
3·方法：运用危险因素指数，对2 0 3 1例外科手术病人进行评价和监测。
Methods: 2 031 operated patients were assessed and monitored by adopting the risk factor exponent.
4·在1981～2002年间批准上市的1 031种药物中，有48％的药物来源于天然产物或与天然的先导结构有关，其中5％的药物为天然化合物的直接应用。
Of the 1 031 new chemical entities covering all diseases in the years 1981-2002, 48% were natural product mimics, 5% were the direct ultility of natural products as sources of novel structures.