At a busy road in front of a gate of Bishan Middle School, the crosswalk is installed to keep the students safe when they cross the road after school.

在璧山中学门口一条繁忙的马路上，为了保证学生放学后过马路时的安全，设置了人行横道。

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Let's say you meet a day-older version of yourself just before you cross through the front of the gate and jump backward in time, as if you will hang around for a day to greet yourself in the past.

比如你在穿过前门以前遇到了比自己年长一天的自己，然后及时地向后跳开，就好像你会花一天时间闲逛来和过去的自己相遇。

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This split is represented by a diamond (a gate element or gateway in BPMN terminology) with a cross inside it.

这个分岔由一个内有十字的菱形表示(bpmn术语中的gate或者gateway)。

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Officials decided not to rebuild the collapsed cross-over gate, which allows fans to travel between the stands and the infield before races.

WSJ: Track Set for Daytona Race After Crash

Larson's car appeared to hit where the cross-over gate a section that can be opened for people to travel back and forth from the infield to the grandstands is located in the fence.

NPR: Fans Injured When Car Sails Into Fence At Daytona

The key that locks the door against terrorists also opens a wider gate to cross-border trade and travel.

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