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ついでに， 序でに， 序に
1. while (one is at it), when, on the occasion of, at the same time (as), on one's way (to), by the way, incidentally, in passing
顺便提一下，顺便讲一下
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寄る， よる
1. to approach, to draw near, to come near, to be close to
2. to gather (in one place), to come together, to meet
3. to stop by (while on one's way to another place), to drop by, to make a short visit
4. to grow old, to grow high (number, etc.)
5. to...
接近，走近