1. For our membership, there are three different levels: AFT, AFA and FFA.
本会有技术会员（AFT）、基本会员（AFA）和资深会员（FFA）三个级别；
2. The rainfall will restrain the development of mix layer which has a feature of mature, die and rebuild fore-and-
aft the duration of rainfall.
夏季，降水过程明显抑制混合层的发展，在暴雨过程及其前后，混合层有明显的成熟、消亡、重新建立的特征。
3. There is generally an advantage in being able to keep propelling machinery as far
aft as a large gearbox restricts possible, but this positioning.
一般来说，使推进装置尽可能远离舰尾是有利的，但是这样布置会受到大齿轮箱的**。
