We are on the threshold of a new era in astronomy.我们很快就将迎来天文学的新纪元。Here she is on the threshold of womanhood.现在她将迈入成年期。The sound was so loud it was on the threshold of pain.声音大得开始使人无法忍受....
Hold the ` handrail for safety , eg while descending steps.抓住扶手以防倒(如下楼时).When travelling at bus or metro, please hold the handrail.坐公交或地铁时, 请抓紧扶手.Untie the handrail rope. Get ready the fenders.解开扶手绳, 准备好护舷的垫子.Fix and tig...