Heatherwick Studio recently unveiled a new project, a kinetic greenhouse at edge of the National Trust's WoolbedingGardens. This beautiful unfolding structure is at the center of a new garden that shows how the Silk Road influences English gardens even in modern times.

The latest ___56___ (engineer) techniques are used to create a protective ___57___ (function) structure that is also beautiful. The design features ten steel "sepals" made of glass and aluminum. These sepals open over four minutes to reveal a 1,517 square foot space like a crown. The Glasshouse opens on warm days ___58___ (give) the inside plants sun and ventilation. Then in colder weather, the structure stays ___59___ (close) to protect plants.

Further, the SilkRouteGarden around the greenhouse ___60___ (walk) visitors through a journey influenced by the ancient Silk Road. The trading routes between Asia and Europe brought silk and spices as well as many plant species to Britain for ___61___ first time. These plants included modern Western ___62___ (favorite) such as rosemary, lavender and fennel. The garden also contains a winding path that guides visitors through the twelve regions of the Silk Road. The path offers over 300 plant species for visitors to see, too.

The Glasshouse stands ___63___ a crowning achievement in contemporary design, to house the flora of sub-tropical south-west China at the end of a path retracing（追溯）the steps along the Silk Route ___64___ brought the plants from their native habitat in Asia to come to define much of the ___65___ (rich) and glory of gardening in England.

答案：56. engineering   57. functional   58. to give   59. closed   60. walks  61. the   62. favourites / favorites   63. as   64. that / which   65. richness

这是2024年高考英语新课标I卷的语法填空题。第56题的答案是 engineering。

请问：engineering techniques 是什么意思？这里的 engineering 是什么词？现在分词？动名词？名词？