(1)乘(add a number to itself a stated number of times and calculate the total)[I，T+n，T+n+prep(by)，T+n+adv(together)]：learn to～学习乘法;can～会做乘法;2 and 4～to make 8. 2乘4等于8。M～2 by 4 (2～ied by 4) is/is equal to/equals/makes 8.2乘以4等于8。If you～2 and 6 (together) or 3 and 4 (together)， you can get 12 (i.e.2×6 or 3×4=12). 如果把 2和6 或 4和3相乘，就得12 这个数。M～the numbers together. 把这些数乘起来。

(2)(使)增加((cause to)increase greatly in number or amount)[I，T+n]：Her anxieties/mistakes/problems～ied.她的焦虑/错误/问题增加了。The rumours～ied. 谣言越传越玄。The world population is～ing fast.世界人口正在迅速增加。Doing this will～our readers/good writings/our chances of success.这样做会增加我们的读者/好的作品/我们成功的机会。Her fortune was～ied as the　years passed.她的财富随时间的推移在不断增加。〖同〗enlarge，increase，add to;〖反〗decrease，diminish;

(3)繁殖(increase in number，esp by breeding)[I，T+n]：Germs/Virus/Flies/Rabbits～rapidly.细菌/病毒/苍蝇/兔子繁殖迅速。Every species of animals～ies naturally.每一种动物都会自然地繁殖。～bacteria and other living organisms in the laboratory 在实验室里繁殖细菌和其他生物;〖同〗reproduce，breed;

→͵multipli′cation n 增多，繁殖;乘法