To refer to without mentioning it directly.

Used to add new (often different) information.

Being what was wanted or needed. used to greet someone in polite or friendly way. Friendly greeting to someone who has arrived. To greet someone who has just arrived.

considered normal, and having or using ideas, beliefs, etc. that are accepted by most people. conventional ideas or activities. bring into mainstream.

begin or be reckoned from particular point in time or space.

tax or duty to be paid on particular class of imports or exports. Tax that a government collects on imported goods. fix price of something according to tariff.

factor defining a system. Characteristics or constant factors; limits.

happening before usual time. before usual time.

Used before you explain something simply, clearly.

Concerning the culture and people of China. language of China.

With your attention, concentration on one thing. become able to see clearly.

general review or summary of subject. give general review or summary of.

Fact of increasing; amount something grows by. To make or become larger in size or amount.

liability to change rapidly and unpredictably.