If this clause is omitted, the lifetime of the route is unchanged.

If this clause is not specified, the retention setting defaults to off.

如果未指定此子句，则默认的保留设置为off。

If this clause is not present, the private key will be encrypted with the database master key.

如果未提供该子句，则使用数据库主密钥对私钥进行加密。

Input is validated using the validate() method; if the clause ( latitude

使用validate（）方法对输入进行验证；如果（latitude

The capability is checked against null in the first part of the if clause.

功能是根据if语句的第一部分获得的。

If we got an if then statement are we asserting an antecedent, an if clause or the consequent, Q the then clause, or are we saying if P then Q.

如果我们的论述中有如果，我们在主张先行词，假设条件句或者结果，然后从句，或者我们说如果P那么。

If I were a boy again, I would look towards cheerful side.

假如我再回到童年，我会凡事都看光明的一面。

If I were a boy again I would look on the cheerful side.

假如我又回到了童年，我就要事事乐观。

If I were a boy again, I would cultivate courage.

如果我还是一个男孩，我将培养自己的勇气。

If I were a boy again, I would school myself to say no more often.

如果能再回到童年，我会经常说“不”。

This paper describes the preparation and service effects of a self-made rust preventer containing chlorhydric acid, organic acid, corrosion remover and water used for radiators and fuel tanks.

介绍了以盐酸、有机酸、缓蚀剂和水为原料自制的散热器与燃油箱除锈剂的配制方法和使用效果。

Test and Application of WCI-1 Water-Solved Rust Preventer

WCI-1水溶性防锈剂试验和使用

Development and Application of Sulphate Rust Preventer

硫酸型除锈液的研制与应用

Development and Application of Water-based Rust Preventer for Cast Blank

铸件毛坯水基防锈剂的研制与应用

Development of Low Hydrochloric Acid Rust Preventer for Steel

钢铁低浓度盐酸酸洗添加剂研制

The paper describes the performance and production application of the surface rust preventer developed to protect the CO2 shielded arc welding wires from rusting.

介绍了为解决二氧化碳气体保护焊焊丝锈蚀问题而研制的表面防锈剂的性能及其在生产上的应用。

Developing a rust preventer for CO_2 shielded are welding wire

二氧化碳气体保护焊焊丝防锈剂的研制

Prior to painting, surface treatment for rust prevention shall be given.

粉刷前，应对该表面所防锈处理。

Discussion on Rust Prevention for Iron Tower of Living Transmission Line

对运行输电线路铁塔防腐问题的探讨

Effect of Cu-plating Quality of Gas Shield Welding Wire on Its Rust Prevention Property

气保焊丝镀铜质量对其防锈性能的影响

Contains effective additives to enhance oxidation stability and rust prevention properties.

含有效添加剂以增进氧化稳定性及防锈性。