preparing for的意思是什么

造句：

1. Preparing income statement and balance sheet based on the balance in the ledger account.
   根据账户余额编制收益表和资产负债表。

2. An essential balm method for preparing rice chromosomes
   水稻染色体标本制备的风油精法。

3. The employee preparing the bank reconciliation has identified the following reconciling items.
   根据上述步骤发现有下列项目需要进行调整。

4. They`re preparing to fire.

      他们准备开火 -要开防护罩吗。