Swimming in the ocean
can be a dangerous activity, especially
when you aren't comfortable in the water.
The ocean is strong
and the direction of the water
can change at any moment.
The best way to keep yourself safe
is to make sure that you are a strong swimmer.
Practicing in a local swimming pool
is the best way to improve your strength.
It is also a good idea
never to go in the ocean alone
if you are not a strong swimmer.
Even though the ocean may look cool
and refreshing on a hot summer day,
it is full of dangers
that you should be aware of at all times.
在大海里游泳可能是一项危险的活动，
特别是当你在水中感到不适的时候。
海洋中的水流很强，而且方向随时都可能会改变。
确保自己安全的最佳方法
就是确定自己是一个游泳健将。
在当地附近的游泳池内练习
是增进耐力的最佳方式。
如果你不是个游泳健将，
千万不要独自下海游泳。
即使在炎炎夏日海洋
看起来凉爽又令人心旷神怡，
但它却是一个危机重重，
须让人随时提高警觉的地方。
(红色部分不被强调)

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