The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....using concrete objects to teach addition and subtraction.用实物来教加减法There will be simple tests in addition, subtraction, multiplication...
I looked at what he'd given me and did a quick subtraction.我看着他给我的东西，快速做了个减法。The difference is found by subtraction.用减法得出差额.The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....
Deborah Jane's mother gave her a withering look.德博拉·简的妈妈狠狠地瞪了她一眼。She launched a withering attack on the Press.她向该通讯社发起了一场声势逼人的讨伐。She gave him a withering look.她极其蔑视地看了他一眼。...
The dinner was often a riotous affair enlivened by superbly witty speeches.宴会常常会因为一些非常诙谐的讲话而气氛活跃，热闹非凡。The otherwise dreary book is enlivened by some very amusing illustrations.这本枯燥乏味的书幸亏加了一些精彩的插图才变得生动有趣.The conversation ...