She left her children behind with a heavy heart.
她十分难过地丢下了她的`孩子们。
The equipment is slow and heavy by modern standards.
按现代标准，那台设备又慢又笨重。
There was heavy fighting in the capital last night.
昨晚首都发生了激烈战斗。
The discussion got a little heavy.
讨论变得有点严肃。
That bridge is too weak for heavy traffic.
那座桥不太牢固，承受不住过多的车辆。