The installment and dismantle of guiding track framework be done under the wind force below grade 4.

升降机导轨架的安装与拆卸必须在风力小于4级的天气情况下进行。

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Expert evaluating system can rapidly track and correctly forecast hazard grade at small open stone quarries, improve the efficiency of safety evaluation and raise reasonable safety countermeasures.

危险程度的专家评价系统能快速地跟踪和准确地预测小型露天采石场危险程度，提高安全评价的效率并及时提出合理的安全对策措施。

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Eventually I made big progress, because I got fourth place in the High School track and field Tournament for my first semester in eleventh grade, which was the second year of my track and field life.

我最终获得了大进展，因为我得到了第四个地方在高中田径运动比赛为我的第一个学期在第十一年级，是第二年我的田径运动生活。

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"Richard and I stated when we bought the course five years ago that our intentions were to restore Ayr to its former glory and to ensure a long-term sustainable future as Scotland's only grade one track, " said Macdonald.

BBC: Ayr Racecourse put up for sale

Its purpose is to track historic valuations of investment-grade art.

FORBES: A Beautiful Asset Class Few Can Own

Comedian Dave Gorman was on track for a career as a mathematician: an A grade at "A level", an "S" level and a place on a maths degree course at Manchester University.

BBC: Celebrity Christmas Special