3289. When you assemble the unit, do not let the parts fall If the fall, permanent damage can occuc

74. 动词词组

73. 英语的复杂句子结构和大量的涵义及同义词会让读者混淆

72. The higher the temperature, the faster evaporation

71. Remove the four screws that attach the flange to the cover

70. 化合物腐蚀在表格6001中有规定。

69. 为了使固化过程更快,给化合物加热

68. Copy density must be uniform throughout the page

67. The longitudinal axis of the airplane is also called the roll axis, and movement of the ailerons rotates an airplane about its longitudinal axis

66. Vertical axis of an aircraft is an imaginary line passing vertically through the center of gravity of an aircraft The vertical axis is called the Z-axis,or the yaw axis

65. 这本书会告诉你最好的飞机维修技术员该了解什么。