without success 没有成功
in vain 徒劳
to no avail 无济于事
fruitless effort 无效的努力
unsuccessful attempt 失败的尝试
1. The team tried to fix the bug, but their efforts were without result.
团队试图修复这个漏洞，但他们的努力没有结果。
2. She knocked on his door repeatedly, but without result.
她反复敲他的门，但没有结果。
3. The medicine was taken, but the fever did not subside without result.
药服了，但发烧并没有因此消退。（注：此处语境稍显别扭，更自然为 The fever did not subside. The treatment was without result.）
3. His attempt to convince the board failed without result.
他试图说服董事会的努力没有结果。
A: Did the new marketing strategy work?
A：新的营销策略起作用了吗？
B: We tried it, but it was without result. Sales didn't go up.
B：我们试了，但没有任何结果。销售额没有上升。
1) 没有结果；无果
2) 徒劳；白忙活
3) 未达预期效果
1. 没有结果；徒劳
e.g.
He searched for his keys without result.
他找钥匙，但没有找到。
phrase
1. without achieving the desired outcome; unsuccessfully; in vain.
Synonym: in vain, to no avail, fruitlessly