wind direction
要是风向合适，我们也可以扬帆过去。
If the wind is right, we can sail over there too.
要是风向对航行不利，就得仔细规划每次换舷，否则就只能等风向好转。
If the wind is unfavorable for sailing, you’ll have to carefully plan every tack; otherwise, you’ll just have to wait for the wind to shift in your favor.