file thirteen 废纸篓

any container to discardorthrow away unwanted paperwork; in an office setting a container for rubbish; the wastebasket

EXAMPLE:

The salesperson crumpled the cancelled order and tossed it into file thirteen.

feel the pinch 感到手头拮据

a financially difficult， tight， strained，orsqueezed circumstanceorsituation

EXAMPLE:

Experiencing little demand for its products， the company began to feel the pinch.

feasibility test可行性试验

a procedureorbasis for evaluationorassessment to see if something is capable of being accomplishedorbrought about，oris possible

EXAMPLE:

A business will often do a feasibility test on a product before spending money to market it to consumers.

door-to-door selling 挨门挨户推销

a method of presenting and selling productsorservices in which a salesperson goes to the residencesorhomes of potential buyers， knocking on their doors to solicit business

EXAMPLE:

Many homeowners dislike door-to-door selling and consider it to be disturbing to their privacy.