两天来他漂流在日本东北外海，试图引起经过的直升机与船只的注意，但都徒劳无功。

For two days, he drifted off Japan's northeastern coast, trying to get the attention of helicopters and ships that passed by _ to no avail.

youdao

两天来他漂流在日本东北外海，试图引起经过的直升机与船只的注意，但都徒劳无功。

For two days, he drifted off Japan's northeastern coast, trying to get the attention of helicopters and ships that passed by _ to no avail.

youdao