全部

1·Import restriction is effected through such measures as imposition of tariffs, fixing of quota, allowing imports only against licenses.

通过征收关税，设置配额，仅准凭许可证进口等措施实行进口限制。

2·Import restriction. Import restriction is effected through such measures as imposition of tariffs, fixing of quota, allowing imports only against licenses.

进口限制。通过征收关税，设置配额，仅准凭许可证进口等措施实行进口限制。

3·A quota is a quantitative restriction that is expressed in terms of either physical quantity or value.

配额是用物品数量或价值表示的数额限制。