Size-wise, the new HOV will be similar to Alvin. Itll be about 37 feet long. The setting area inside will be a small sphere, about 8 feet wide, like Alvin, itll carry a pilot and two passengers. It will be just as maneuverable. In most other ways, it will give passengers more opportunities to enjoy the view, for one thing. Alvin has only three windows, the new vehicle will have five, with more overlap so that the passengers and the pilot can see the same thing.
Alvin can go up and down at a rate of 30 meters every second, and its maximum speed is 2 knots , while the new vehicle will be able to ascend and descend at 44 meters per second. Itll reach speeds of 3 knots, or 3.5 miles per hour.
词汇:
fraction n. 一部分 dive v. n. 潜水;跳水
underwater adj. 水下的;adv. 在水下
bound adj. 受约束的,一定的
manned adj. 载人的
sphere n. 球体;范围
undersea adj. 海底的
maneuverable adj. 机动的,可调动的
submersible n. 潜艇;潜水器
overlap v. n. 重叠
upgrade n. 升级
ascend v. 上升
geologist n. 地质学家
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