1. This product is intended for use in a one|time escape only.
此处的in我还不太理解,麻烦老师解说
2. They are suitable for adults in various shapes.
此处的in是和 in various shapes 一块的吗，表示“各种形状的”？
【1】This product is intended for use in a one|time escape only.
解答: 介词“in”和后面名词短语“one|time escape”构成介词短语“表示在...状况下”作定语修饰前面名词“use”。
This kind of hammer is intended for use in one|time escape only.
【名词短语use in one|time escape only的中文意思：仅在一次性逃生中的状况下是用。】
【2】They are suitable for adults in various shapes.
解答:介词“in”表示某物呈现“某种形状,某种颜色或者某种尺寸”。
Bikes come in all colors, shapes and sizes.
【介词短语in all colors, shapes and sizes 的中文意思 ：有各种各样的颜色，形状和尺寸。】
