Tigers fight to death only when a tigress is defending her young, or when a tiger is guarding a tigress from the attentions of other males.

只有当母老虎在保护自己的幼崽时，或者当公虎在保护母老虎不受其他雄性动物的注意时，它们才会殊死搏斗。

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The last issue worth considering is when to use Transformers directly from a factory, and when to use Templates objects.

最后一个值得考虑的问题是，何时使用从工厂直接获得的Transformer和何时使用Templates对象。

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The ability to recreate a specific physical configuration is critical when migrating a new service or system from testing to production, or when performing software maintenance.

在从测试到产品阶段迁移新服务或新系统时，或者软件维护时，能够重建特定物理配置的能力显得非常重要。

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The two thousand-seven film "Away From Her" tells what happens to one marriage when a partner suffers from the disease.

VOA: special.2009.09.15

All right, so I need to tell you the path, when I go from one state to the other.

好，当我从一个状态过渡到另一个状态时，我需要告诉你们路径。

麻省理工公开课 - 热力学与动力学课程节选

So when somebody is going to develop a healthy eating plan you can draw from a number of potentially beneficial structures.

如果有人想制定一个健康饮食计划,那么可以借鉴很多可能的有益饮食结构

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The curfew will run from midnight to 0600 when practice starts at 1000 on Fridays, and from 0100 to 0700 when practice starts at 1100 on a Saturday.

BBC: F1 drivers face tougher penalties

The average wait from when a plane landed to when the last passenger cleared immigration, not counting walking time from the plane to the immigration hall, was 23 minutes, even with only 11 booths manned, according to CBP figures.

WSJ: Border Delay Data Leave Fliers Up in the Air

Growing up, my family had the same television from when I was 4 to when I was 12.

FORBES: Hitching a Ride with the Next 'Angry Birds' Before Take-Off