当朋友们轻松登山的时候，你远远地落在后面，上气不接下气或者干脆放弃。
When your friends hiked up a hill with ease, you had to lag behind, huffing and puffing—or had to just call it quits.
他现在肯定已经把目光转向了西班牙的伊比利亚航空，或者干脆放弃这个计划。
He must now turn his attention to Iberia of Spain or be left behind.
相反，学习和提高是令人高兴的，新手会很快成为中间用户——或者干脆放弃。
Conversely, learning and improving is rewarding, so beginners become intermediates very quickly-or they drop out altogether.
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