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| 61. | Trees surround the pond. |
| 树木围绕着池塘. |
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| 62. | to surround and protect |
| 拱卫 |
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| 63. | Trees surround our house. |
| 我们房子的四周都是树。 |
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| 64. | inverted arch |
| 【建】仰拱 |
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| 65. | independent arch method |
| 纯拱法 |
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| 66. | knuckled camber |
| 直线型梁拱|折角型梁拱 |
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| 67. | an arch whose jambs are not at right angles with the face. |
| 拱的侧板与拱的正面搭配角度不对的拱。 |
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| 68. | stiffened trussed arch |
| 加劲桁架拱 |
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| 69. | haunch of arch |
| 梁腋, 拱腋, 拱的托臂 |
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| 70. | advance of periastro |
| 拱线运动 |
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