汤姆：标准箱每箱重300千克。

Tom: Standard crate size is 300 kilograms.

集装箱的运输船变得庞大，最先进的能够装载15000个标准箱。

Vessels became gigantic, with the latest capable of carrying 15,000 standard containers.

上个世纪70年代，中远的“风雷”轮在上海至日本航线上试运20英尺标准箱成功，标志着我国已经跨入了国际集装箱运输的时代。

Since the vessel Feng Lei of Cosco succeeded in transporting 20 feet standard containers in the 1970s, our country has strode into the new era of international container transportation.