reach: vt.“与…取得联系” e.g. a.I called but couldn't reach you. 我打电话给你，但没联系上。 b.I can be reached by phone if you want me to help you. 如要我帮忙，打电话能找到我。 Backreach: vt. “与······取得联系” e.g. a. I called but couldn’t reach you. 我打电话给你，但没联系上。 b. I can be reached by phone if you want me to help you. 如要我帮忙，打电话能找到我。 Back