We just lost tire pressure on the left outboard and left inboard, both tires.
刚刚发现左侧内外舷的轮胎压力都没了，两个轮胎都是。
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The huge majority of sailboats large enough to have a motor were built for either an inboard or an outboard, so you'll usually be choosing between boats that already have one or the other installed.
If you are looking for a large daysailer or a small cruising sailboat, you may be choosing between sailboats that have an inboard engine and those having an outboard motor.