英汉双语例句-生物医药大词典

Always check the return value of new for null.

中文意思：
总是检查返回值是否无效。

以下为相关句子列表(点击查看，可以看对应的解释）：

	Always call the teacher by their titles or their last names.			总是称呼老师职位或尊姓。
	Always carry in your harness one spare line and repair adhesive material.			套袋内总是有一条备份绳子及一段专用贴布。
	Always carry the camera and flash in bag with one extra roll of film and spare batteries.			在照相包内应装有相机、闪光灯、多余一套胶卷及一副电池。
	Always check a delegate for null before invoking it.			调用前始终检查委托是否为空。
	Always check that the forks are fully engaged and load is stable before moving.			行驶前检查货物是否稳定与叉结合是否完好。
	Always check the return value of new for null.			总是检查返回值是否无效。
	Always check the tools/machines for any malfunction before proceeding with the work.			工作进行前，应检查工具/机器的性能。
	Always cheerful , be happy to social intercourse, neglects of social rules like American.			美国人一般性情开朗、乐于交际、不拘礼节。
	Always clean your infant's gums after feeding.			每次喂食后要经常清洁您婴儿的牙龈。
	Always construct objects in a valid state.			总是构建状态有效的对象。
	Always correct mistakes, no matter how long it takes.			始终要纠正错误，不必要求多长时间解决。