1.
Plight of Collective Action:Long-term Ineffectiveness of Backward Areas;
集体行动的困境：落后地区制度长期失效的原因
2.
Prolong Failure Cycle of API Round Thread Tubing by System Control
系统控制延长API圆螺纹油管的失效周期
3.
If neither party requests an extension， or if one the parties says no to the extension， this contract will no longer be in force upon the expiration of the stipulated period of service.
若双方均未提出延长合同期限或一方不同意延长合同期限，则本合同至期满之日当即失效。
4.
Random Double-Blind Research of Zaleplon in Clinical Treatment of Long-term Insomnia;
扎来普隆对长期失眠症的临床疗效的双盲双模拟对照研究
5.
the country's chronic unemployment problem
国家的长期失业问题.
6.
Their long struggle ended in failure.
他们长期斗争终告失败.
7.
( of an agreement,a document,etc)become no longer valid;expire
（指协议、文件等）失效,过期
8.
If the applicant fails to apply for business commencement upon the completion of the preparation stage or the extended preparation stage, the original approval document for the preparation shall become void automatically.
筹建期限届满或延长期限届满，申请人未提出开业申请的，原筹建批准决定自动失效。
9.
Balancing Long-Term Benefits with Short-Term Losses
平衡长期利益和短期损失
10.
A contract subject to a time of expiration is extinguished at such time.
附终止期限的合同，自期限届满时失效。
11.
Standing full power
长期有效全权（证书）
12.
What's the deadline for claim?
索赔的有效期多长？
13.
EXTEND OPTION LONGEST POSSIBLE
请尽量延长有效期。
14.
Demand draft has a very long time of validity.
票汇的有效期限长，
15.
How long will the offer be open?
报价的有效期多长？
16.
How long will the registered trade-mark remain valid?
注册商标的有效期多长？
17.
Bidder shall have the right to refuse to grant such an extension of validity of bid without forfeit their bid bond.
投标人有权拒绝延长投标有效期限并不会因此而失掉其投标保证金。
18.
Clinical study on the curative effect of the long-term combination of amiodarone and metoprolol for ventricular arrhythmias induced by coronary artery disease
长期小剂量胺碘酮和倍他乐克联合治疗心肌梗死后室性心律失常的疗效观察