壳牌启动30亿美元股票回购计划

达 is used before numbers or amounts to express 'reaching' or 'amounting to' a certain level. It's commonly used in formal contexts like news reports and business writing to indicate achievement of a specific quantity.

将 is placed before a verb to indicate future action in formal or written Chinese. It's more formal than 会 and commonly appears in news, official announcements, and business contexts.

This pattern expresses a range or change from one point to another. 至 is more formal than 到 and frequently used in written Chinese to show numerical changes, time spans, or transitions.

并 is a formal conjunction used to connect two verb phrases or clauses, meaning 'and' or 'moreover'. It indicates an additional action by the same subject and is common in formal writing.

This pattern describes an increase with both the magnitude of change (percentage or amount) and the resulting target value. 提高 means 'to raise/increase', followed by the amount of increase, then 至 introduces the final value.